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Jupiter with coloured horizontal bands of clouds. The shadow of the moon Io is seen as a dark circle in the top left

Jupiter, Io and its shadow, by Ralf Burkart, Germany

video
Created for the OAE

Caption: First place in the 2021 IAU OAE Astrophotography Contest, category Galilean moons. This time-lapse of Jupiter taken in 2017 from Germany beautifully illustrates the transit of one of the Galilean moons, Io, in front of Jupiter. As this is simply a moon casting a shadow on a planet it is equivalent to a lunar eclipse on Earth observed from further away. While the shadow of the moon is clearly visible from the beginning, it might be difficult to spot the moon itself against the background of the beautiful atmospheric bands of Jupiter the first time the video is seen. Watching it repeatedly allows appreciating the rapid motion and rotation in this fantastic observation.
Credit: Ralf Burkart/IAU OAE

Glossary Terms: Galilean Satellites , Gas Giant , Io , Jupiter , Moons , Orbit , Outer Planets , Planet , Transit
Categories: Solar System

License: Creative Commons Attribution 4.0 International (CC BY 4.0) Creative Commons Attribution 4.0 International (CC BY 4.0) icons

This file on Zenodo ( video 12.64 MB)


The asteroid Ida is grey and shaped like a potato with lots of shallow craters. It's moon Dactyl is 40 times smaller

Ida and Dactyl

image

Caption: This picture of the asteroid Ida with its satellite Dactyl was taken by the Galileo space probe in August 1993 from a range of 10,870 kilometers (6,755 miles). Ida is a heavily cratered, irregularly shaped asteroid in the main asteroid belt between Mars and Jupiter. This image is proof that asteroids like the 56 km large Ida can possess their own moons.
Credit: NASA/JPL
Credit Link

Glossary Terms: Asteroid , Asteroid Belt , Moons
Categories: Solar System

License: Public Domain Public Domain icons

File ( image 56.80 kB)


Europa is round with large patches of brown to white colours, covered by numerous crevices, randomly oriented on the surface

Europa

image

Caption: This image taken by NASA's Galileo space probe in September 1996 shows Jupiter's ice-covered satellite, Europa, in approximate natural color. Long, dark lines are fractures in the crust, some of which are more than 3,000 kilometers (1,850 miles) long. The bright feature containing a central dark spot in the lower third of the image is a young impact crater some 50 kilometers (31 miles) in diameter. Europa is about 3,160 kilometers (1,950 miles) in diameter, or about the size of Earth's moon.
Credit: NASA/JPL/DLR

Glossary Terms: Galilean Satellites , Moons
Categories: Solar System

License: Public Domain Public Domain icons

File ( image 622.91 kB)


The Milky Way rises from the horizon over a landscape with trees, water and the distant glow of city lights

Flowing Night Sky

video
Created for the OAE

Caption: Honourable mention in the 2022 IAU OAE Astrophotography Contest, category Time lapses of celestial patterns.   This time-lapse was shot from Slovakia in August 2020. By fixing the relative movement of the sky to Earth's rotation in some of the frames, we can experience a different perspective as a viewer. The Milky Way, our home galaxy, is visible throughout the whole video. The bright objects near the Milky Way are Jupiter and Saturn, close together, Jupiter being the brighter one. This video also shows the interaction of amateur astronomers observing the Perseids meteor shower with their telescopes pointed towards the sky. An unfortunate aspect of the art of astronomical observing, clouds can suddenly cover the whole sky. The fog occurs mostly because of the higher humidity after the rain. Most of the light trails in the sky are made by satellites, but some of them, appearing just very briefly and not very noticeably, are meteors, as the video was shot around the peak of Perseids meteor shower.
Credit: Robert Barsa/IAU OAE

Glossary Terms: Jupiter , Milky Way , Saturn , Shooting Star
Categories: Milky Way and Interstellar Medium , Naked Eye Astronomy , Stars

License: Creative Commons Attribution 4.0 International (CC BY 4.0) Creative Commons Attribution 4.0 International (CC BY 4.0) icons

This file on Zenodo ( video 254.11 MB)


The nearly full Moon with craters, light highlands and dark plains

Full moon

image

Caption: The image shows the nearly full Moon observed with a small telescope and a DSLR camera.
Credit: Luc Viatour
Credit Link

Glossary Terms: Full Moon , Lunar Phase , Moon , Moons
Categories: Solar System

License: Creative Commons Attribution-ShareAlike 3.0 Unported Creative Commons Attribution-ShareAlike 3.0 Unported icons

File ( image 924.21 kB)


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