Those looking up last night already saw a beautiful show as the near-full moon rose in clear skies. Tonight is slightly ...

This is because it is burning so ferociously that its fire is blue, as opposed to our own cooler sun which is more yellow. Such massive stars are called blue giants, while our own sun is a yellow ...

This star actually produces 20,500 times more light than our sun but appears fainter because it is so far away. The star Spica is a massive 'blue giant' about 250 light years from Earth which has ...