Nereid

Nereid, the last satellite of Neptune to be discovered before NASA Voyager's recent discoveries, was first seen by Gerard Kuiper in 1949. Until this Voyager 2 image was obtained, all that was known about Nereid was its orbital parameters and intrinsic brightness. This Voyager view of Nereid was obtained on Aug. 24, 1989 at a distance of 4.7 million kilometers (2....

More: https://images.nasa.gov/details/PIA00054
Credit: NASA/JPL

#nereid #voyager #astrodon #astronomy #astrophotography #astrophysics

Some closing words on a discussion on the future of European astronomy at #EAS2026, addressed to early career researchers:

Xavier Barcons: keep pushing for cooperation, don't give up on this.

Samaya Nissanke: Don't take European leadership for granted, don't take ESA and ESO granted. Keep fighting for the European model of cooperation. But also: Keep the science central to what you are doing, keep having fun and keep the reason why you can to astronomy precious to you.

#astrodon #astronomy

Smooth Ground on Rosetta Destination Comet

A patch of relatively smooth ground on the nucleus surface of comet 67P/Churyumov-Gerasimenko appears in this image taken by the navigation camera on the European Space Agency Rosetta spacecraft in October 2014.

More: https://images.nasa.gov/details/PIA18868
Credit: ESA/Rosetta/NAVCAM

#comet #rosetta #astrodon #astronomy #astrophotography #astrophysics

🚨 Beyond the limit 🚨

New ESO study finds that current proposals to launch 1.7+ million satellites into orbit would have devastating consequences for astronomy.

The most extreme proposals come from SpaceX & Reflect Orbital

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📷 F. Kamphues, ESO/M. Kornmesser

#astrodon #astronomy #astrophysics #space #science #environment #pollution

Ganymede Northern Hemisphere

Ganymede Northern Hemisphere http://photojournal.jpl.nasa.gov/catalog/PIA00356

More: https://images.nasa.gov/details/PIA00356
Credit: NASA/JPL

#ganymede #voyager #astrodon #astronomy #astrophotography #astrophysics

Polar Lightning on Jupiter

Images taken by the New Horizons Long-Range Reconnaissance Imager LORRI of Jupiter night side showed lightning strikes. Each trike is probably the cumulative brightness of multiple strikes.

More: https://images.nasa.gov/details/PIA10096
Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Southwest Research Institute

#jupiter #newhorizons #astrodon #astronomy #astrophotography #astrophysics