The sky guide challenge

Just north of mag. +3.9 Asellus Australis (Delta (δ) Cancri), you’ll spot a ‘little cloud’, which is what ‘Nephelion’, M44’s ancient Greek name, means. At only 577 lightyears away, M44 (also known as

The spring sky is heavy with galaxies. As the stars of winter rotate westward, they drag the winter Milky Way with them, leaving us to gaze out into deep space at right angles to the plane of our home

Our first target is the Little Pinwheel Galaxy, NGC 3184, positioned 48 arcminutes west of mag. +3.0 Tania Australis (Mu (μ) Ursae Majoris). This spiral galaxy has an apparent magnitude of +10.1 but i

HUBBLE SPACE TELESCOPE, 22 DECEMBER 2025 Spiral galaxies MCG-02-05-050 (right) and -050a (left) are together known as Arp 4. That means they feature in Halton Arp's Atlas of Peculiar Galaxies, compile

1 Sunday Ganymede disappears into Jupiter’s shadow at 19:48 UT, reappearing again at 23:11 UT. 5 ◀ Thursday From now until 26 March is the optimum time for this month’s Deep-Sky Tour (page 56) of obje

Since JWST’s launch four years ago, some mind-blowing observations have been made by this internationally operated, state-of-the-art, space-based super-telescope