The Moon’s orbit (its circular path around the Earth) is indeed getting larger, at a rate of about 3.8 centimeters per year. (The Moon’s orbit has a radius of 384,000 km.) The reason for the increase is that the Moon raises tides on the Earth. Because the side of the Earth that faces the Moon [...]
A supernova is the explosion of a star at the end of its life. When this happens, huge amounts of matter and energy are released in the explosion, giving rise to a bright new object in the sky. This start remnant remains visible for a few weeks and then dies away.
Supernova 2005ap shown with four [...]
Biggest Space Explosion Creates Giant Bubbles
The largest explosion ever seen in space reveals black holes to be more influential than expected, perhaps sometimes stifling star formation in a galaxy while gobbling up trillions upon trillions of tons of gas.
The eruption has been ongoing for some 100 million years, [...]
