The night sky – april

1 Jul 00:00 AEST (30 Jun, 14:00 UT) 15 Jul 23:00 AEST (13:00 UT) 31 Jul 22:00 AEST (12:00 UT) The chart accurately matches the sky on the dates and times shown for Sydney, Australia. The sky is differ

BEST TIME TO SEE: Nights of 9/10, 10/11 and 11/12 July A full Moon occurs when the Moon is opposite the Sun in the sky or, in other words, when its ecliptic longitude is 180° from the Sun. The eclipti

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Mark Bailey is a freelance writer who has written for The Observer, The Times and National Geographic. marksbailey.com Many people rely on GPS apps to explore new landscapes, but with natural navigati

Galaxies come in all sorts of shapes and sizes. They can be broadly classified as spiral, elliptical or irregular, but each of these still leaves plenty of scope for variety. Take, for instance, the s