Ganymede – Page 6 – Astronomy Now

23 October 2025

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[ 21 October 2025 ] Europe’s planet hunting spacecraft complete and ready for final testing News
[ 24 September 2025 ] Nova outburst in Centaurus News
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[ 8 September 2025 ] Potentially habitable planet TRAPPIST-1e displays tentative evidence for an atmosphere News
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New interactive website tools for observers

8 December 2014 Ade Ashford

Astronomy Now Online brings you a powerful interactive global Almanac and UK-based all-sky star maps — the first of a new suite of tools to help plan your observing sessions and travel.

Jupiter’s moon dance and shadow play to delight observers

3 December 2014 Ade Ashford

The orbits of Jupiter’s large Galilean moons Io, Europa, Ganymede and Callisto are presently almost edge-on to our line of sight, causing the moons to regularly eclipse and occult each other. Multiple shadow transits are also on view!

Spooky shadow play gives Jupiter a giant eye

28 October 2014 Astronomy Now

Just in time for Halloween, the Hubble Space Telescope has revealed a spooky view of Jupiter’s Great Red Spot staring back at Earth.