Today's NASA Astronomy Picture of the Day, credited to astrophotographer David Cowland, is a wide, wispy shell of red-glowing gas known as RCW 86. It's a quiet-looking target, but the story behind it stretches back almost two thousand years and... Continue Reading →
Billions of years in the future, our dead sun will morph into a giant cosmic jewel, a new study suggests. Like the vast majority of stars in our Milky Way galaxy, the sun will eventually collapse into a white dwarf, an... Continue Reading →