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: James Webb Space Telescope
Astronomers Detect a Signature of Life on a Distant Planet
Further studies are needed to determine whether K2-18b, which orbits a star 120 light-years away, is inhabited, or even habitable.
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.
Galaxies in the Early Universe Were Shaped Like Bananas, Study Suggests
Images from the Webb telescope suggest that newborn galaxies look weirder than expected. Exactly how screwy was physics at the dawn of time?
How to Create a Black Hole Out of Thin Air
Black holes were thought to arise from the collapse of dead stars. But a Webb telescope image showing the early universe hints at an alternative pathway.
In Space, the Past Is Future (and Equally Unpredictable)
Not even the most advanced physics can reveal everything we want to know about the history and future of the cosmos, or about ourselves.
Back Then, Baby Galaxies. Next, a Super-Mega Galactic Cluster?
The Webb telescope has spotted some of the oldest known collections of stars. They may have a very bright future.
Webb Telescope Spots a Distant Spiral Galaxy Like Our Own
LEDA 2046648 has an eerie resemblance to our Milky Way galaxy, but it lies a billion light-years away.
The Webb Telescope Is Just Getting Started
The first scientific results are coming in, and the $10 billion instrument is working even better than astronomers had dared to hope.