Dr. John Barentine FRAS<p>From a <span class="h-card" translate="no"><a href="https://flipboard.com/@LiveScience" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>LiveScience</span></a></span> op-ed by <span class="h-card" translate="no"><a href="https://mastodon.social/@sundogplanets" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>sundogplanets</span></a></span>: "<a href="https://astrodon.social/tags/LEO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LEO</span></a> is a valuable resource that must be protected and shared in a way that benefits the most people while simultaneously protecting LEO for use by future generations. We cannot have tens of thousands of <a href="https://astrodon.social/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a> in LEO without severe consequences for the atmosphere and an increasingly high likelihood of <a href="https://astrodon.social/tags/KesslerSyndrome" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>KesslerSyndrome</span></a>, which will limit our use of satellites for decades to centuries."</p><p><a href="https://www.livescience.com/space/astronomy/what-goes-up-must-come-down-how-megaconstellations-like-spacexs-starlink-network-pose-a-grave-safety-threat-to-us-on-earth-opinion" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">livescience.com/space/astronom</span><span class="invisible">y/what-goes-up-must-come-down-how-megaconstellations-like-spacexs-starlink-network-pose-a-grave-safety-threat-to-us-on-earth-opinion</span></a></p><p><a href="https://astrodon.social/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Space</span></a> <a href="https://astrodon.social/tags/SpaceEnvironment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceEnvironment</span></a> <a href="https://astrodon.social/tags/SpaceDebris" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceDebris</span></a></p>
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#satellites
7 posts · 6 participants · 0 posts today
Space Environmentalism<p>From an op-ed in <span class="h-card" translate="no"><a href="https://flipboard.com/@LiveScience" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>LiveScience</span></a></span> by CSE's own <span class="h-card" translate="no"><a href="https://mastodon.social/@sundogplanets" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>sundogplanets</span></a></span>: "<a href="https://mastodon.social/tags/LEO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LEO</span></a> is a valuable resource that must be protected and shared in a way that benefits the most people while simultaneously protecting LEO for use by future generations. We cannot have tens of thousands of <a href="https://mastodon.social/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a> in LEO without severe consequences for the atmosphere and an increasingly high likelihood of <a href="https://mastodon.social/tags/KesslerSyndrome" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>KesslerSyndrome</span></a>, which will limit our use of satellites for decades to centuries."</p><p><a href="https://www.livescience.com/space/astronomy/what-goes-up-must-come-down-how-megaconstellations-like-spacexs-starlink-network-pose-a-grave-safety-threat-to-us-on-earth-opinion" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">livescience.com/space/astronom</span><span class="invisible">y/what-goes-up-must-come-down-how-megaconstellations-like-spacexs-starlink-network-pose-a-grave-safety-threat-to-us-on-earth-opinion</span></a></p><p><a href="https://mastodon.social/tags/SpaceEnvironment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceEnvironment</span></a></p>
Space Environmentalism<p>"Invisible radiation leaking out of private <a href="https://mastodon.social/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a>, like SpaceX's <a href="https://mastodon.social/tags/Starlink" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Starlink</span></a> spacecraft, is disrupting radio astronomers' ability to detect important signals from across the universe. Some researchers are so worried about this invisible pollution that they think we could eventually reach an 'inflection point,' beyond which ground-based <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> instruments could become radio-blind to the cosmos.”</p><p><a href="https://www.livescience.com/space/astronomy/no-radio-astronomy-from-the-ground-would-be-possible-anymore-satellite-mega-swarms-are-blinding-us-to-the-cosmos-and-a-critical-inflection-point-is-approaching" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">livescience.com/space/astronom</span><span class="invisible">y/no-radio-astronomy-from-the-ground-would-be-possible-anymore-satellite-mega-swarms-are-blinding-us-to-the-cosmos-and-a-critical-inflection-point-is-approaching</span></a></p><p><a href="https://mastodon.social/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Space</span></a> <a href="https://mastodon.social/tags/SpaceEnvironment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceEnvironment</span></a> <a href="https://mastodon.social/tags/RadioAstronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RadioAstronomy</span></a></p>
RTN<p>Samantha Lawler:<br>"<br>What goes up must come down: How megaconstellations like SpaceX's Starlink network pose a grave safety threat to us on Earth<br>"<br>".. challenge that satellite engineers and operators must now meet: .. they need to provide services from orbit with fewer, longer-lived satellites, .."</p><p><a href="https://www.livescience.com/space/astronomy/what-goes-up-must-come-down-how-megaconstellations-like-spacexs-starlink-network-pose-a-grave-safety-threat-to-us-on-earth-opinion" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">livescience.com/space/astronom</span><span class="invisible">y/what-goes-up-must-come-down-how-megaconstellations-like-spacexs-starlink-network-pose-a-grave-safety-threat-to-us-on-earth-opinion</span></a></p><p>30.5.2025</p><p><a href="https://chaos.social/tags/megaconstellation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>megaconstellation</span></a> <a href="https://chaos.social/tags/Raumfahrt" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Raumfahrt</span></a> <a href="https://chaos.social/tags/Satelliten" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Satelliten</span></a> <a href="https://chaos.social/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a> <a href="https://chaos.social/tags/SpaceFlight" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceFlight</span></a> <a href="https://chaos.social/tags/SpaceX" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceX</span></a> <a href="https://chaos.social/tags/Starlink" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Starlink</span></a></p>
Good News Community<p>Trees near volcanoes signal eruptions by turning greener due to CO2 absorption from rising magma, which NASA satellites detect, offering early warnings. This system could protect 10% of Earth’s population living near volcanoes. In 2018, it evacuated 56,000 people in the Philippines safely before an eruption. Trees hold the key to disaster prevention!</p><p><span class="h-card" translate="no"><a href="https://a.gup.pe/u/goodnews" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>goodnews</span></a></span> </p><p><a href="https://mastodon.cosmicnation.co/tags/GoodNews" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GoodNews</span></a> <a href="https://mastodon.cosmicnation.co/tags/NASA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NASA</span></a> <a href="https://mastodon.cosmicnation.co/tags/VolcanoScience" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>VolcanoScience</span></a> <a href="https://mastodon.cosmicnation.co/tags/SpaceTechnology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceTechnology</span></a> <a href="https://mastodon.cosmicnation.co/tags/DisasterPrevention" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>DisasterPrevention</span></a> <a href="https://mastodon.cosmicnation.co/tags/Innovation" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Innovation</span></a> <a href="https://mastodon.cosmicnation.co/tags/ClimateScience" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ClimateScience</span></a> <a href="https://mastodon.cosmicnation.co/tags/Satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Satellites</span></a> <a href="https://scitechdaily.com/volcanoes-send-secret-signals-through-trees-and-nasa-satellites-can-see-them/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">scitechdaily.com/volcanoes-sen</span><span class="invisible">d-secret-signals-through-trees-and-nasa-satellites-can-see-them/</span></a></p>
Benjamin Carr, Ph.D. 👨🏻💻🧬<p><a href="https://hachyderm.io/tags/TV" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>TV</span></a>-signal based <a href="https://hachyderm.io/tags/BPS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>BPS</span></a> tested as fallback for <a href="https://hachyderm.io/tags/GPS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GPS</span></a> — digital TV infrastructure could come to the rescue if <a href="https://hachyderm.io/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a> are compromised<br>Broadcast Positioning System (BPS) works by adding an <a href="https://hachyderm.io/tags/ATSC" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ATSC</span></a> frame to output, and this will usually provide timing accuracy to 100ns, which is good but not quite as good as GPS (~10ns). However, for BPS positioning, you will need to be in signal range of four transmitters, and even then, accuracy will be in the order of a 100-meter radius. <br><a href="https://www.tomshardware.com/service-providers/tv-signal-based-bps-tested-as-fallback-for-gps-digital-tv-infrastructure-could-come-to-the-rescue-if-satellites-are-compromised" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">tomshardware.com/service-provi</span><span class="invisible">ders/tv-signal-based-bps-tested-as-fallback-for-gps-digital-tv-infrastructure-could-come-to-the-rescue-if-satellites-are-compromised</span></a></p>
Space Environmentalism<p>"The increasing accumulation of artificial space debris is introducing a new form of light pollution, which is progressively impacting night sky brightness and observational conditions for professional astronomy." </p><p>The modeled effect predicts "an increase in night sky background brightness of 5 to 11% above natural levels attributable to these objects."</p><p><a href="https://doi.org/10.1093/mnrasl/slaf052" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">doi.org/10.1093/mnrasl/slaf052</span><span class="invisible"></span></a></p><p><a href="https://mastodon.social/tags/Satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Satellites</span></a> <a href="https://mastodon.social/tags/SpaceDebris" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceDebris</span></a> <a href="https://mastodon.social/tags/NightSky" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NightSky</span></a> <a href="https://mastodon.social/tags/LightPollution" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LightPollution</span></a> <a href="https://mastodon.social/tags/SpaceEnvironment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceEnvironment</span></a></p>
Nick Appleyard<p>Time for a new <a href="https://mastodonapp.uk/tags/Introduction" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Introduction</span></a>.</p><p>Inside me there is a battle between two Nicks.</p><p>One lives on LinkedIn. He is a champion of <a href="https://mastodonapp.uk/tags/technology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>technology</span></a> and of people who use it to improve our lives. For <a href="https://mastodonapp.uk/tags/esa" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>esa</span></a> he seeks ways for <a href="https://mastodonapp.uk/tags/space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>space</span></a> and <a href="https://mastodonapp.uk/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a> to transform <a href="https://mastodonapp.uk/tags/European" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>European</span></a> <a href="https://mastodonapp.uk/tags/industries" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>industries</span></a>, and he channels the support of their <a href="https://mastodonapp.uk/tags/governments" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>governments</span></a> towards them.<br>📡 🛰️ 🚀 🇪🇺 🇬🇧 📈 </p><p>One lives on Mastodon. They recognise their privilege and luck in being a tall, white, middle-aged middle-class, educated, able-bodied, startlingly handsome cishet man. They feel the righteous rage of Ned <a href="https://mastodonapp.uk/tags/Ludd" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Ludd</span></a>, witnessing the destruction as <a href="https://mastodonapp.uk/tags/tech" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tech</span></a> and <a href="https://mastodonapp.uk/tags/capitalism" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>capitalism</span></a> degrade <a href="https://mastodonapp.uk/tags/society" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>society</span></a> and the <a href="https://mastodonapp.uk/tags/environment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>environment</span></a>. And they seek the company of <a href="https://mastodonapp.uk/tags/woke" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>woke</span></a> and open people, who lighten the load with kindness and truth, humour, empathy and strength.<br>🌍 🤗 🇪🇸 🌈 ♻️ 🐈 </p><p>Which Nick wins?<br>The one you feed.<br>☕ 🍕 🍨 🍺</p>
AI6YR Ben<p>Oopsie?</p><p>(also, how many people are going to lose their heads over this one?)</p><p><a href="https://m.ai6yr.org/tags/RemoteImaging" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>RemoteImaging</span></a> <a href="https://m.ai6yr.org/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a> </p><p><a href="https://www.bbc.com/news/articles/cx2qgdnxxe2o" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">bbc.com/news/articles/cx2qgdnx</span><span class="invisible">xe2o</span></a></p>
Nonilex<p>The concept includes <a href="https://masto.ai/tags/space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>space</span></a>-based <a href="https://masto.ai/tags/missiles" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>missiles</span></a> that would launch from <a href="https://masto.ai/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a> in orbit to intercept conventional & nuclear missiles launched from Earth.</p><p>"I think it's opening a Pandora's box," said Victoria Samson, dir of space <a href="https://masto.ai/tags/security" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>security</span></a> & stability at the Secure World Foundation think tank in Washington, referring to deploying missiles in space. "We haven't truly thought about the long-term consequences for doing so," she added.</p><p><a href="https://masto.ai/tags/military" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>military</span></a> <a href="https://masto.ai/tags/geopolitics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>geopolitics</span></a> <a href="https://masto.ai/tags/GovernmentSpending" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GovernmentSpending</span></a> <a href="https://masto.ai/tags/waste" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>waste</span></a> <a href="https://masto.ai/tags/fraud" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fraud</span></a> <a href="https://masto.ai/tags/Trump" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Trump</span></a></p>
Nonilex<p>The announcement of <a href="https://masto.ai/tags/Trump" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Trump</span></a>’s <a href="https://masto.ai/tags/GoldenDome" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GoldenDome</span></a>, a vast network of <a href="https://masto.ai/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a> & <a href="https://masto.ai/tags/weapons" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>weapons</span></a> in Earth's orbit set to cost $175 billion, could sharply escalate the militarization of <a href="https://masto.ai/tags/space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>space</span></a>, a trend that has intensified over the last decade.</p><p>While the world's biggest space powers - the <a href="https://masto.ai/tags/US" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>US</span></a>, <a href="https://masto.ai/tags/Russia" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Russia</span></a> & <a href="https://masto.ai/tags/China" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>China</span></a> - have put <a href="https://masto.ai/tags/military" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>military</span></a> & <a href="https://masto.ai/tags/intelligence" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>intelligence</span></a> assets in orbit since the 1960s, they have done so mostly in secrecy.</p><p><a href="https://masto.ai/tags/geopolitics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>geopolitics</span></a> <a href="https://masto.ai/tags/GovernmentSpending" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GovernmentSpending</span></a> <a href="https://masto.ai/tags/waste" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>waste</span></a> <a href="https://masto.ai/tags/fraud" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>fraud</span></a> <a href="https://masto.ai/tags/corruption" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>corruption</span></a></p>
Space Environmentalism<p>"Researchers project that active <a href="https://mastodon.social/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a> could skyrocket to 1,00,000 before stabilising, a threshold considered the 'carrying capacity' of the <a href="https://mastodon.social/tags/LEO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LEO</span></a>. This limit, where collision risks become significant, could be reached by 2050 at current launch rates. ... Scientists are urging a slowdown in launches until global regulations can address these issues.”</p><p><a href="https://in.mashable.com/science/94354/earths-orbit-is-reaching-saturation-point-as-satellite-launches-boom" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">in.mashable.com/science/94354/</span><span class="invisible">earths-orbit-is-reaching-saturation-point-as-satellite-launches-boom</span></a></p><p><a href="https://mastodon.social/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Space</span></a> <a href="https://mastodon.social/tags/SpaceEnvironment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceEnvironment</span></a> <a href="https://mastodon.social/tags/OrbitalCrowding" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>OrbitalCrowding</span></a></p>
Steve Thompson PhD<p>Watch the World in 35 Minutes: Scientists Unveil Game-Changing Satellite Mega-Constellation Design</p><p><a href="https://scitechdaily.com/watch-the-world-in-35-minutes-scientists-unveil-game-changing-satellite-mega-constellation-design/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">scitechdaily.com/watch-the-wor</span><span class="invisible">ld-in-35-minutes-scientists-unveil-game-changing-satellite-mega-constellation-design/</span></a></p><p>A novel LEO constellation design uses grouped satellites and swarm optimization to achieve precise Earth observation, validated by simulation with 891 satellites.</p><p><a href="https://mastodon.social/tags/SATELLITES" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SATELLITES</span></a> <a href="https://mastodon.social/tags/SPACE" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SPACE</span></a> <a href="https://mastodon.social/tags/PRESS" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PRESS</span></a></p>
Dr. John Barentine FRAS<p>They buried the lede: "Reflect is planning to launch its first sat next spring to illuminate 10 locations around the world. The idea is to boost public interest with the lighting events, but so far, responses haven’t always been supportive."</p><p><a href="https://payloadspace.com/reflect-orbital-raises-20m-series-a/" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">payloadspace.com/reflect-orbit</span><span class="invisible">al-raises-20m-series-a/</span></a></p><p><a href="https://astrodon.social/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Space</span></a> <a href="https://astrodon.social/tags/Satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Satellites</span></a> <a href="https://astrodon.social/tags/LightPollution" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>LightPollution</span></a></p>
Dr. John Barentine FRAS<p>The recently launched initial <a href="https://astrodon.social/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a> in the AST SpaceMobile BlueBird constellation are bright, but less so than the prototype BlueWalker 3 spacecraft launched in 2022. "Based on a large set of visual observations, the mean apparent magnitude of BlueBird satellites is 3.44, while the mean of magnitudes adjusted to a uniform distance of 1000 km is 3.84. Near zenith the spacecraft can be as bright as magnitude 0.5. ... A model for their brightness shows that design changes since the BlueWalker 3 mission can explain the behavior of BlueBird."</p><p><a href="https://arxiv.org/abs/2505.05820" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/abs/2505.05820</span><span class="invisible"></span></a></p><p><a href="https://astrodon.social/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Space</span></a></p>
Dr. John Barentine FRAS<p>Evidence that some of the Chinese <a href="https://astrodon.social/tags/Qianfan" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Qianfan</span></a> satellites are tumbling and presumably no longer under control. "All six of the tumbling <a href="https://astrodon.social/tags/spacecraft" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>spacecraft</span></a> are from Launch 2. As noted in Section 2, those satellites were made by a different manufacturer than the spacecraft in Qianfan launches 1, 3 and 4. <span class="h-card" translate="no"><a href="https://mastodon.social/@planet4589" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>planet4589</span></a></span> indicates that all the tumbling spacecraft have failed."</p><p><a href="https://arxiv.org/abs/2505.07194" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">arxiv.org/abs/2505.07194</span><span class="invisible"></span></a></p><p><a href="https://astrodon.social/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Space</span></a> <a href="https://astrodon.social/tags/Satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Satellites</span></a> <a href="https://astrodon.social/tags/SpaceEnvironment" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SpaceEnvironment</span></a></p>
Flipboard Science Desk<p>It's getting crowded up there. New spacecraft aims to police satellites in orbit.</p><p>From <span class="h-card" translate="no"><a href="https://flipboard.com/@IEEESpectrum" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>IEEESpectrum</span></a></span>: "The 700 kilogram Jackal, fitted with 20 thrusters and a large fuel tank is meant to cruise from spot to spot, patrolling its assigned region of space."</p><p><a href="https://flip.it/PG4Gb9" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="">flip.it/PG4Gb9</span><span class="invisible"></span></a></p><p><a href="https://flipboard.social/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Space</span></a> <a href="https://flipboard.social/tags/Satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Satellites</span></a> <a href="https://flipboard.social/tags/NASA" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NASA</span></a> <a href="https://flipboard.social/tags/Science" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Science</span></a></p>
beSpacific<p>Tracking Global <a href="https://newsie.social/tags/Forest" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Forest</span></a> <a href="https://newsie.social/tags/Biomass" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Biomass</span></a> <a href="https://newsie.social/tags/EU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>EU</span></a> <a href="https://newsie.social/tags/Space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Space</span></a> Agency released most detailed <a href="https://newsie.social/tags/dataset" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>dataset</span></a> yet on how much <a href="https://newsie.social/tags/carbon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>carbon</span></a> is stored in world’s <a href="https://newsie.social/tags/forests" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>forests</span></a> tracking changes 2007-2022. Built by combining data from multiple Earth-observing <a href="https://newsie.social/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a> dataset estimates carbon held in woody parts of <a href="https://newsie.social/tags/trees" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>trees</span></a> mainly trunks & branches—across different forest types. While most accurate in areas with up to 400 tonnes of biomass per hectare, it corrects earlier underestimates in high-density forests <a href="https://www.esa.int/Applications/Observing_the_Earth/Space_for_our_climate/ESA_unveils_longest-ever_dataset_on_forest_biomass" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">esa.int/Applications/Observing</span><span class="invisible">_the_Earth/Space_for_our_climate/ESA_unveils_longest-ever_dataset_on_forest_biomass</span></a></p>
Nonilex<p>The classified message asked agencies, whose tools include <a href="https://masto.ai/tags/surveillance" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>surveillance</span></a> <a href="https://masto.ai/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a>, communications intercepts & <a href="https://masto.ai/tags/spies" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>spies</span></a> on the ground, to identify people in <a href="https://masto.ai/tags/Greenland" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Greenland</span></a> & <a href="https://masto.ai/tags/Denmark" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Denmark</span></a> who support <a href="https://masto.ai/tags/US" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>US</span></a> objectives for the island.</p><p>The directive is one of the first concrete steps <a href="https://masto.ai/tags/Trump" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Trump</span></a>’s admin has taken toward fulfilling the president’s often-stated desire to acquire Greenland.</p><p><a href="https://masto.ai/tags/geopolitics" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>geopolitics</span></a> <a href="https://masto.ai/tags/espionage" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>espionage</span></a> <a href="https://masto.ai/tags/NATO" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>NATO</span></a> <a href="https://masto.ai/tags/allies" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>allies</span></a> <a href="https://masto.ai/tags/idiocracy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>idiocracy</span></a></p>
Nonilex<p><a href="https://masto.ai/tags/Musk" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Musk</span></a> is clearly imagining a future in which neither his network nor his will can be restrained by the people of this world. But even now, here on Earth, <a href="https://masto.ai/tags/space" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>space</span></a> <a href="https://masto.ai/tags/internet" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>internet</span></a> is a big <a href="https://masto.ai/tags/business" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>business</span></a>. Fiber networks cannot extend to every bit of dry land on the planet, & they certainly can’t reach airborne or seaborne vessels. More than 5 million people have already signed up for <a href="https://masto.ai/tags/Starlink" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Starlink</span></a>, & it is growing rapidly.</p><p><a href="https://masto.ai/tags/tech" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>tech</span></a> <a href="https://masto.ai/tags/power" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>power</span></a> <a href="https://masto.ai/tags/monopoly" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>monopoly</span></a> <a href="https://masto.ai/tags/satellites" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>satellites</span></a></p>
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