The universe began with a vast explosion that generated ... A vast disk of gas and debris that swirled around this new star coalesced into planets, moons, and asteroids. The image on the left ...

As the star condenses and compacts, it heats up even further, burning the last of its hydrogen ... which emits no energy. Because the universe's oldest stars are only 10 billion to 20 billion ...

Steinhardt's research, published in The Astrophysical Journal, suggests that red star-forming galaxies might have played a much bigger role in the universe's history. This could change our current ...