In April, astronomers said they had detected a possible signature of life on the exoplanet K2-18b. Now, three independent analyses discount the evidence.
Tag: Telescopes and Observatories
Astronomers Get ‘More Than a Hint’ That Dark Energy Isn’t What They Thought
New data further challenge the best scientific theory of the history and the structure of the universe. But a separate recent result reinforces it.
A Parade of Planets Is Marching Through the Night Sky
With Mercury joining the show, all seven of Earth’s celestial neighbors will be present at dusk this week.
‘Ultrahigh Energy’ Neutrino Found With a Telescope Under the Sea
It’s the most energetic particle of its kind ever discovered, and scientists have no idea where it came from.
Barnard’s Star Finally Has a Planet, and Possibly More
For a century, exoplanet hunters have “discovered” planets around a nearby star, only to retract the claims. But the latest find is for real.
Can Axions Save the Universe?
The hunt for dark matter is shifting from particles to waves named after a laundry detergent.
Two Black Holes are Giving the Cosmos a Fright
The ghosts of stars are up to their usual mischief.
Palomar Observatory Bids Farwell to its Cosmic Restaurant
Palomar Observatory bids farewell to a tradition of napkin rings, cowbells and astronomical table conversation.
Chandra Observatory Captures Two Supernovas in (Slow) Motion
For the 25th anniversary of the Chandra X-ray Observatory, NASA produced ghostly time-lapse videos of two centuries-old stellar explosions.
Piping Up at the Gates of Dawn
Astronomers have found the earliest and most distant galaxy yet.