Among the 88 official constellations, Cassiopeia ranks as the 25th largest and 30th brightest. It contains four stars (Alpha [α], Beta [β], Gamma [γ], and Delta [δ] Cassiopeiae) that are among ...

From the iconic 'Pillars of Creation' to the vivid colours of the Lagoon Nebula, check out these 7 astonishing photos of ...