What do the letters of stellar classification stand for?

O, B, A, F and so on… What do they all mean?

Supernova of 386 CE was too faint to have been witnessed

A new look at the debris from an exploded star in our galaxy has astronomers re-examining when it actually happened

Small blue galaxy could shed light on the Big Bang

The ‘little lion’ galaxy contains the lowest level of heavy elements ever detected in a gravitationally bound system of stars

New Horizons Update: Water ice and blue skies found on Pluto

Recent colour images reveal more about the dwarf planet

Why does Venus look blue in some spacecraft images?

What is it about this terrestrial world’s atmosphere that gives it its unusual colour?

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