Matthew Nelson

Latest Articles

How old is the youngest astronomer?

What limits the efficiency of heat engines?

Did Galileo say the Sun was the center of the universe?

How long does it take water to go through soil?

What star is formed from a supernova?

What kind of star is left after a supernova?

How did Edwin Hubble help Albert Einstein?

Do red giants live short lives?

What's the difference between a hunter's moon and a harvest moon?

What creates the magnetic field that surrounds the planet?