For the 25th anniversary of the Chandra X-ray Observatory, NASA produced ghostly time-lapse videos of two centuries-old stellar explosions.
Author: DENNIS OVERBYE
Piping Up at the Gates of Dawn
Astronomers have found the earliest and most distant galaxy yet.
The Magnetic Heart of the Milky Way
A new map of the center of the Milky Way galaxy reveals details of its magnetic fields
A Tantalizing ‘Hint’ That Astronomers Got Dark Energy All Wrong
Scientists may have discovered a major flaw in their understanding of that mysterious cosmic force. That could be good news for the fate of the universe.
As Stellar Observations Improve, Earth’s History and Future Get Fuzzier
Astronomers have gotten better at tracking the motions of stars just beyond the solar system. But that’s made it harder to predict Earth’s future and reconstruct its past.
As Stellar Observations Improve, Earth’s History and Future Get Fuzzier
Astronomers have gotten better at tracking the motions of stars just beyond the solar system. But that’s made it harder to predict Earth’s future and reconstruct its past.
Good News and Bad News for Astronomers’ Biggest Dream
The National Science Foundation takes a step (just one) toward an “extremely large telescope.”
The Doomsday Clock Keeps Ticking
Are humans the only beings in the universe confronting global self-destruction? Or just the last ones standing?
Dark Galaxies: What Happens When Stars Are Nearly Invisible
To dark matter and dark energy, add dark galaxies — collections of stars so sparse and faint that they are all but invisible.
A Famous Black Hole Gets a Second Look From Astronomers
Repeated studies of the supermassive black hole in the galaxy Messier 87 confirm that it continues to act as Einstein’s theory predicted it would.