Is the big bang, and all that came from it, a holographic mirage from another dimension?
The largest stars die in explosions more powerful than anyone thought possible—some triggered in part by the production of antimatter
Thousands of years ago a star exploded in a supernova, leaving behind the glorious riot of colored gas we see now as the Crab Nebula. The light from this explosion reached Earth in 1054 A.D., creating what looked like a new bright star in the sky as recorded by ancient Chinese and Arab astronomers.
Cosmic dust is crucial to the birth of stars and planets, but how so much of it came to be present in the young universe has been a mystery
Maybe not. The observations that led astronomers to deduce its existence could have another explanation: our galaxy lies at the center of a giant cosmic void