Callisto – Page 5 – Astronomy Now

Make the most of observing Jupiter and its moons during April

1 April 2015 Ade Ashford

Jupiter may be two months past opposition, but it’s still big, bright and high to the south before 9 pm from the centre of the British Isles. The Galilean moons, their shadows and the Great Red Spot are all on show — plus mutual phenomena of the moons.

Jupiter set to enthral observers on the night of February 26th

26 February 2015 Ade Ashford

Currently the third brightest celestial object in the night sky of the British Isles after the Moon and Venus, Jupiter presents a cornucopia of phenomena for observers with medium to large telescopes tonight.

Hubble captures rare triple-moon conjunction

9 February 2015 Astronomy Now

On 24th January 2015, three of Jupiter’s Galilean moons were in simultaneous transit across the face of their parent planet. The Hubble Space Telescope captured this rare event in amazing detail.

Jupiter keeps observers’ busy during March

2 February 2015 Ade Ashford

The Solar System’s largest planet reached opposition on February 6th, but it’s still big and bright in the March sky. Here’s our quick guide to Jupiter at its best for 2015.

Jupiter’s moon events enthral observers

2 January 2015 Ade Ashford

The continued edgewise orbital aspect of Jupiter’s large moons Io, Europa, Ganymede and Callisto means that they still regularly eclipse and occult each other. Multiple shadow transits also continue throughout January.

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!