James Webb Space Telescope
Latest about James Webb Space Telescope
Astronomers solve mystery of 'Green Monster' in famous supernova remnant (photo)
By Sharmila Kuthunur published
The mysterious wispy green light captured by the James Webb Space Telescope last year near the heart of Cassiopeia A turns out to be a result of a blast wave slamming into surrounding material.
12 James Webb Space Telescope findings that changed our understanding of the universe in 2023
By Sharmila Kuthunur published
These are the James Webb Space Telescope's most notable discoveries in 2023.
Warped supernova spotted by James Webb Space Telescope could settle a longstanding debate
By Keith Cooper published
Gravitationally lensed images of two different supernovas in the same galaxy can be used to measure the expansion rate of the universe.
James Webb Space Telescope may have found the oldest black hole in the universe
By Ben Turner published
The James Webb Space Telescope's discovery of the universe's oldest black holes is giving astronomers some vital clues for how they came to be.
James Webb Space Telescope spies record-breaking 'failed star' that shouldn't exist (video)
By Robert Lea published
"We're seeing something new and unexpected."
James Webb Space Telescope's 'Cosmic Christmas Bauble' earns spot in White House Advent Calendar (photo, video)
By Robert Lea published
The powerful space telescope's image of Cassiopeia A shining brightly and silently was revealed as part of the first-ever White House Advent Calendar.
James Webb Space Telescope bites cosmic burger to create 1st ice map of planet-forming disk
By Robert Lea published
The James Webb Space Telescope has taken a bite out of a cosmic burger to create a 2D inventory of different forms of ice surrounding a planet-birthing disk.
James Webb Space Telescope pierces through dust to find an ancient ghostly galaxy
By Sharmila Kuthunur published
A ghostlike dusty galaxy from the early universe might represent a whole population of hidden galaxies.
Get the Space.com Newsletter
Breaking space news, the latest updates on rocket launches, skywatching events and more!