u/Neaterntal

This observation is part of a long-running image campaign to aid in the classification and volume estimates of dunes in the U.S. Geological Survey global dune database. Sand dunes are among the most widespread wind features present on Mars. An earlier image from 2017 showed intresting height vs. ripple wavelength trends, but we need a digital terrain model to assess.

​​ID: ESP_076988_1165

​date: 29 December 2022

​altitude: 249 km

https://uahirise.org/hipod/ESP_076988_1165

​NASA/JPL-Caltech/University of Arizona

This observation is part of a long-running image campaign to aid in the classification and volume estimates of dunes in the U.S. Geological Survey global dune database. Sand dunes are among the most widespread wind features present on Mars. An earlier image from 2017 showed intresting height vs. ripple wavelength trends, but we need a digital terrain model to assess.

​​ID: ESP_076988_1165

​date: 29 December 2022

​altitude: 249 km

https://uahirise.org/hipod/ESP_076988_1165

​NASA/JPL-Caltech/University of Arizona

10 frames with 30s exposures into a video.

18.5.26

📸 吉本＠彗星屋 (katsumi_comet )

https://x.com/katsumi_comet/status/2056727152410980723

Three crescents. Top: the Moon. Midde: Mars. Bottom: Earth. Background: the infinite black of space.

​The Moon and Earth are from Artemis II, and Mars is from the Psyche mission.

Each image was taken *in the last six weeks*

The Moon: Artemis II image ART002-E-19570 Earth: Artemis II image ART002-E-25101 Mars: Psyche Imager A

Credits:

The Moon and Earth: NASA/Artemis II Crew Mars: NASA/JPL-Caltech/ASU/MSSS/Kevin M. Gill

Source

https://bsky.app/profile/theplanetaryguy.bsky.social/post/3mm5ou3cnhs2k

Dark circles around a bright disk around the center of the galaxy.

https://bsky.app/profile/melina-iras07572.bsky.social/post/3mm4leond3c2a

Image

https://www.virtualtelescope.eu/2026/05/16/near-earth-asteroid-2026-jh2-extremely-close-encounter-an-image-16-may-2026/

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15-34-metre asteroid 2026 JH2 will pass ~91,000 kilometers (56,500 mi) from the Earth at 21:57 Universal Time (UT)/5:57 PM EDT. This is about a quarter of the Earth-Moon distance, and just over twice as far as geosynchronous orbit. Here's a capture of the inbound space rock from the 16th.

The building-sized asteroid will reach +11th magnitude at closest approach. Astronomer Gianluca Masi will feature the asteroid pass live tomorrow starting at 19:45 UT - Will work out more sighting ops for this one this afternoon.​

Keep in mind, the path is only approximate, as parallax comes into play on a close pass. Serious asteroid trackers should use NASA’s Horizons System for fine pointing. Good hunting! ssd.jpl.nasa.gov/horizons/​

https://bsky.app/profile/astrodave.bsky.social/post/3mm2lmuxpw22d

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On 18 May 2026, the near-Earth Asteroid 2026 JH2 will have an extremely close, but safe, encounter with us, coming at 91.000 km from the Earth, about 24% of the average lunar distance. The Virtual Telescope Project will show it to you live!

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The near-Earth asteroid 2026 JH2 was discovered by the Mt. Lemmon Survey on 10 May 2026 and announced two days later. Its diameter in supposed to be in 15 – 34 meters range, while the minimum distance from us will be reached on 18 May 2026, around 21:57 UTC, when this rock will be at 91.000 km from the Earth (source: Nasa/JPL). That is 24% of the average lunar distance.

The Virtual Telescope Project will show it live, online, just before the fly-by time, when it will be peaking in brightness, around magnitude 11.5, easy to see even with a small telescope. This way, you can have a look from the comfort of your home.

The live feed will start on 18 May 2026 at 19:45 UTC.​

https://www.virtualtelescope.eu/2026/05/12/near-earth-asteroid-2026-jh2-extremely-close-encounter-online-observation-18-may-2026/

Image

https://www.virtualtelescope.eu/2026/05/16/near-earth-asteroid-2026-jh2-extremely-close-encounter-an-image-16-may-2026/​

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Tony Dunn

https://bsky.app/profile/tony873004.bsky.social/post/3mm3f2jfdps2i

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asteroid 2026 JH2 will pass ~91,000 kilometers (56,500 mi) from the Earth at 21:57 Universal Time (UT)/5:57 PM EDT. This is about a quarter of the Earth-Moon distance, and just over twice as far as geosynchronous orbit. Here's a capture of the inbound space rock from the 16th.

15-34-metre

The building-sized asteroid will reach +11th magnitude at closest approach. Astronomer Gianluca Masi will feature the asteroid pass live tomorrow starting at 19:45 UT - Will work out more sighting ops for this one this afternoon.​

Keep in mind, the path is only approximate, as parallax comes into play on a close pass. Serious asteroid trackers should use NASA’s Horizons System for fine pointing. Good hunting! ssd.jpl.nasa.gov/horizons/​

https://bsky.app/profile/astrodave.bsky.social/post/3mm2lmuxpw22d

.

On 18 May 2026, the near-Earth Asteroid 2026 JH2 will have an extremely close, but safe, encounter with us, coming at 91.000 km from the Earth, about 24% of the average lunar distance. The Virtual Telescope Project will show it to you live!

.

The near-Earth asteroid 2026 JH2 was discovered by the Mt. Lemmon Survey on 10 May 2026 and announced two days later. Its diameter in supposed to be in 15 – 34 meters range, while the minimum distance from us will be reached on 18 May 2026, around 21:57 UTC, when this rock will be at 91.000 km from the Earth (source: Nasa/JPL). That is 24% of the average lunar distance.

The Virtual Telescope Project will show it live, online, just before the fly-by time, when it will be peaking in brightness, around magnitude 11.5, easy to see even with a small telescope. This way, you can have a look from the comfort of your home.

The live feed will start on 18 May 2026 at 19:45 UTC.​

https://www.virtualtelescope.eu/2026/05/12/near-earth-asteroid-2026-jh2-extremely-close-encounter-online-observation-18-may-2026/

Description from Lucy Yunxi Hu

https://www.facebook.com/photo/?fbid=26940560955596290&set=a.6281127298632958

​ " ​This image shows Comet C/2025 R3 (PANSTARRS) crossing the Orion over four nights in May 2026 from dark-sky locations near Canberra, Australia. The sequence captures the comet gradually fading after perihelion as its ion tail becomes fainter and more diffuse over time.

The widefield background is a multi-night panorama of the Orion region, featuring Barnard’s Loop, M42, the Horsehead Nebula, and surrounding molecular clouds. Due to weather limitations, the four comet positions were captured from two locations near Canberra and later aligned to the surrounding star field to preserve the comet’s relative motion across the sky.

I spent around eight nights outside after work over the past two weeks trying to capture Comet C/2025 R3. I even met some amateurs by chance on some nights. This is, in many ways, my very first deep-sky astrophotography project after spending time learning astrophotography, and definitely not an easy one for me (lots to improve!). There were many new techniques and skills to learn, along with unstable weather on several nights. Despite all the challenges, seeing the comet gradually move through Orion over multiple nights was honestly quite magical! Clear skies!

EXIF:

Dates: May 7, 9, 11, and 12, 2026 (corresponding to the comet positions from lowest to highest in the image).

​Locations: Colinton, NSW, Australia (near South Canberra) for the two lower comet positions, and Gundaroo, NSW, Australia (near North Canberra) for the two upper comet positions.

​Gear: Benro Polaris + Canon R5 + Canon EF 135mm prime lens. RGB: f/2.0–2.2, ISO1600, multiple 30s exposures over multiple nights (plus several 5s and 2s exposures for M42 core).

​Ha: f/2.0–2.2, ISO1600–6400, multiple 30s exposures over multiple nights. Processed using PixInsight, Sequator, RegiStar, and Photoshop​ "

https://bsky.app/profile/thomasappere.bsky.social/post/3mm2jmtjwq22u

Images

https://solarsystem.nasa.gov/psyche-raw-images/

"The moon, almost spilling out of the sky, is sinking below the horizon.

I waited for one of the few chances each year to see the thin crescent moon peeking out from behind a sea cave on an island, and was lucky enough to witness this fleeting moment." 📸 KAGAYA

https://bsky.app/profile/kagaya11949.bsky.social/post/3mm2bkcm2e22d

Day 093, orbit 1439 — Sunday morning science episode #7: static electricity

Source

https://x.com/Soph_astro/status/2055949600356184216

4K HDR 36m20s youtu.be/F2jsuJPU0Lo

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'Aqua Chroma' is a transformative artistic and educational work created by Seán Doran including a remix of 'Gravitation' by Stellardrone licensed under CC BY 4.0

Credit: Himawari / JAXA / JMA / NOAA / Seán Doran

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1,700 frames of Himawari-8 satellite data from IR bands 8, 9 & 10 spanning 4 days from 30th December 2019 are repaired, remastered, resized & retimed to create the 4k video footage in this film. Highest fidelity raw data is used to preserve quality during production. A method called frame interpolation is used to calculate the extra video frames required to create smooth motion.

To create an experience free from distraction all gaps in the data need to be repaired. Missing frames from each daily image sequence for each IR band are created. Missing sections from each daily image sequence for each IR band are patched using surrounding data.

​Visual artifacts that detract from the desired outcome are repaired. The full sequence for each IR band is assigned to a color channel and processed to arrive at the final look. Intermediate sequences are produced to consolidate repaired & processed sequences and to assist with frame interpolation method used to create Ultra High Definition video footage.

More in video description

https://m.youtube.com/watch?v=F2jsuJPU0Lo

A close view of Mars from orbit, showing a dusty reddish surface covered in impact craters, with thin whitish high altitude clouds stretching along the upper limb of the planet against black space.​

Full size 5k image: flic.kr/p/2sdpsHP
Credit: ESA/DLR/FUBerlin/AndreaLuck CC BY

2025-07-24
South is up
HR211_0000 ND3+GR3+BL3

https://bsky.app/profile/andrealuck.bsky.social/post/3mlyl4tevls2g

Multispectral Imager Camera B 4x Infrared 1 filter (723 nm) Green filter (550 nm) Blue filter (495)

https://solarsystem.nasa.gov/psyche_images/6388/

NASA/JPL-Caltech/ASU/j. Roger

https://bsky.app/profile/landru79.bsky.social/post/3mlyjsg52b22b

Look at the farside of the Sun right now! Perhaps one of the largest sunspot clusters of the solar cycle is now visibile, and according to Solar Orbiter STIX data, it is also producing flares.

Solar Orbiter STIX data shows that one of the farside active regions may have produced a solar flare measuring between M5.9 and X2.1. This is not the only strong flare, though. There are other (likely) M-class flares in this plot, probably all from the big sunspot cluster.​

Vincent Ledvina

https://bsky.app/profile/vincentledvina.bsky.social/post/3mlxuwrtww22e

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So based on data from Solar Orbiter which is currently on the farside of the Sun, two powerful X-class solar flares have exploded yesterday May 15th and today the 16th. Check out the sunspot!! Check in mind Mercury performed a superior conjunction on May 14th - 15th, so these solar flares were exactly in line with it!​

Stefan Burns​ ​https://x.com/StefanBurnsGeo/status/2055664204955406529​

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Photo of the Sun from Solar Orbiter

https://www.cosmos.esa.int/web/solar-orbiter/latest-data

And data from STIX

https://datacenter.stix.i4ds.net/view/ql/lightcurves

NASA, ESA, CSA, STScI

Captured together with NIRCam target NGC 4569

"​a white cluster of stars at the top left quarter, many remote orange galaxies in the background"

Yuval Harpaz

https://bsky.app/profile/yuvharpaz.bsky.social/post/3mlw4cebiec2i

Filters F115W, F150W, F277W

A galaxy with mostly white stars. Bright center, a spiral arm at the bottom with dust making stars redder. Hints of another spiral arm on the upper right, due to concentration of stars.
https://bsky.app/profile/melina-iras07572.bsky.social/post/3mlur52suek2o

Wider view

https://static.uahirise.org/hipod/ESP_076983_2570-2.jpg​

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This observation was acquired for long-term monitoring of longitudinal trends, particularly of these stunning dunes. This footprint is the North Polar region of Mars called Vastitas Borealis.

ID: ESP_076983_2570

date: 28 December 2022

​altitude: 317 km

https://uahirise.org/hipod/ESP_076983_2570

​NASA/JPL-Caltech/University of Arizona

This observation features dunes at high latitude with frost well into summer. This image footprint is in Planum Boreum at the South Pole of Mars. With this picture, we can acquire repeat observations to track changes over time.

ID: ESP_076979_2650

​date: 28 December 2022

​altitude: 319 km

https://uahirise.org/hipod/ESP_076979_2650

NASA/JPL-Caltech/University of Arizona

This observation features dunes at high latitude with frost well into summer. This image footprint is in Planum Boreum at the South Pole of Mars. With this picture, we can acquire repeat observations to track changes over time.

ID: ESP_076979_2650

​date: 28 December 2022

​altitude: 319 km

https://uahirise.org/hipod/ESP_076979_2650

NASA/JPL-Caltech/University of Arizona