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#astronomy

78 posts62 participants0 posts today
Public
Dr. John Barentine FRAS

Hot new James Webb Space Telescope image just dropped. And this one's a banger.

Meet the galaxy cluster Abell S1063.
"This behemoth collection of galaxies, lying 4.5 billion light-years from Earth in the constellation Grus (the Crane), dominates the scene. Looking more closely, this dense collection of heavy galaxies is surrounded by glowing streaks of light, and these warped arcs are the true object of scientists’ interest: faint galaxies from the Universe’s distant past."

"With 9 separate snapshots of different near-infrared wavelengths of light, totalling around 120 hours of observing time and aided by the magnifying effect of gravitational lensing, this is Webb’s deepest gaze on a single target to date."

A field of galaxies in space, dominated by an enormous, bright-white elliptical galaxy that is the core of a massive galaxy cluster. Many other elliptical galaxies can be seen around it. Also around it are short, curved, glowing red lines, which are images of distant background galaxies magnified and warped by gravitational lensing. A couple of foreground stars appear large and bright with long spikes around them.
#Astronomy#JWST#Galaxies
Public
Kelly Lepo

Woah! Really cool new videos from the Goode Solar Telescope at Big Bear Solar Observatory show timelapse adaptive optics views of the Sun's corona. This one is of a solar prominence being shaped by the Sun’s magnetism.

I like the choice to color hydrogen-alpha light pink.

You should check out all of the videos (the Sun is so fluffy!):
nso.edu/press-release/new-adap

GIF
#Space#Astronomy#SolarObserving
Public *
Mark McCaughrean

Time warp 😵‍💫

At the MPIA in Heidelberg @mpi_astro today, Nienke van der Marel describing the reference science case for protoplanetary disks with the METIS mid-infrared instrument being built for the 39-m diameter European Extremely Large Telescope 🔭

The diagram she’s using to illustrate the stages of star & planet formation was made 30 years ago ✨

By me, when I was a staff member here at the MPIA 🙃👴

A woman standing in a planetarium talking to an audience with a picture projected behind her showing the four canonical stages of star and planet formation in graphical form.
#Science#Astronomy#SpaceScience
Public
Richard

Discovery of a dwarf planet candidate in an extremely wide orbit: 2017 OF201

"We report the discovery of a dwarf planet candidate, 2017 OF201, currently located at a distance of 90.5 au. Its orbit is extremely wide and extends to the inner Oort cloud, with a semi-major axis of 838 au and a perihelion of 44.9 au precisely determined from 19 observations over seven years."

arxiv.org/abs/2505.15806

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arXiv.orgDiscovery of a dwarf planet candidate in an extremely wide orbit: 2017 OF201We report the discovery of a dwarf planet candidate, 2017 OF201, currently located at a distance of 90.5 au. Its orbit is extremely wide and extends to the inner Oort cloud, with a semi-major axis of 838 au and a perihelion of 44.9 au precisely determined from 19 observations over seven years. Assuming a typical albedo of 0.15, we estimate a diameter about 700 km, making it the second-largest known object in this dynamical population and a likely dwarf planet. Its high eccentricity suggests that it is part of a broader, unseen population of similar objects totaling about 1 % of Earth's mass. Notably, the orbit of 2017 OF201 lies well outside the clustering of longitude of perihelion observed in extreme trans-Neptunian objects, which has been proposed as dynamical evidence for a distant, undetected planet.
#Astrodon#Astronomy
Public
earthling

100 Things to See in the Night Sky by Dean Regas, 2020

Discover the amazing wonders of the night sky with this expanded edition to 100 Things to See in the Night Sky, perfect for every amateur stargazer and armchair astronomer!

Keep your feet on the ground and experience the night sky to the fullest by exploring planets, satellites, and constellations with this all-inclusive reference guide to space.

@bookstodon
#books
#nonfiction
#astronomy
#stargazing

100 Things to See in the Night Sky, Expanded Edition is full of information on the many amazing things you can see with a telescope, or just your naked eye! From shooting stars to constellations and planets to satellites, this book gives you a clear picture of what you can see on any given night. Learn about the celestial bodies that have captured people's imaginations for centuries, with specific facts alongside traditional myths and beautifully illustrated photographs and star charts that will help you know where to look for the best view.
Public *
MPI for Gravitational Physics

Two years ago, “O4” began, the fourth joint observing run of the gravitational-wave detectors of @LIGO, Virgo, KAGRA and GEO600.

This is how we looked into the future on May 24, 2023 ➡️ aei.mpg.de/1033824/gravitation

As of today, the network has identified 203 significant signal candidates. One of them has already been published as an exceptional signal.

In the first three observing runs (O1, O2 and O3), the detectors have identified 90 gravitational-wave signals.

There is currently a break for maintenance work on the instruments, which is scheduled to last until June 4. After that, O4 will continue and last until October 7.

Graphic showing when the LIGO, Virgo and KAGRA detectors took part in the joint observation runs and at what sensitivity from 2015 onwards. Future, planned observation runs are also shown. A dashed red line labeled “We are here.” marks today's date on the timeline.
#GravitationalWaves#Astronomy#BlackHoles
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