Don't miss your last chance to get a good look at Comet A3 before it's gone for another 80,000 years
Comet A3 hasn't been past Earth since the Neanderthals. Your last chance to see it is approaching fast. Here's where and how to spot it.
Telescopes
Side-by-side images from the James Webb and Hubble space telescopes show why NASA spent 25 years and $10 billion on the Webb
NASA's Webb Space Telescope keeps spotting details no one has seen before: countless galaxies, clouds of dust birthing new stars, and new colors.
13 photos from NASA's most powerful X-ray space telescope reveal the invisible universe
The universe's wildest objects and events, from black holes to the collisions of neutron stars, emit X-rays. NASA's Chandra telescope captures them.
Check out stunning photos from the $2 billion space telescope that captures the invisible universe — and that NASA plans to defund
The Chandra X-ray Observatory has snapped stunning photos of the invisible universe for 25 years. NASA may end the mission early.
Scientists built a 3-ton camera with a 5-foot-wide lens to discover hazardous asteroids that NASA can't see
A Menlo Park, California, lab built this camera to learn about dark energy and dark matter, flag hazardous asteroids, and spot new space phenomena.
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Scientists want to build telescopes on the moon for up to $10 billion to see more of the universe than the James Webb Space Telescope
Astronomers want to build giant telescopes on the moon. They're already drafting blueprints and making proposals, some with cash from NASA.
Elon Musk's SpaceX was the satellite villain of the skies. It's taking a 'money hit' to try and fix the problem.
SpaceX's Starlink internet satellites brighten the night sky enough to interfere with scientific research. It's testing solutions to appease critics.
Telescope in Utah detects mysterious cosmic ray beyond our galaxy
Scientists in Utah believe the "Amaterasu particle" traveled from beyond our galaxy.
A dreamy new image from NASA's James Webb Space Telescope shows the birth of 50 sun-like stars
Webb's vibrant one-year anniversary image shows about 50 stars in various stages of formation about 390 light-years away from Earth, NASA said.
27 jaw-dropping images from NASA's James Webb Space Telescope show its first year peering into the cosmos
Images from NASA's impressive James Webb Space Telescope are changing the way we see the universe — and this is just year one.
10 times NASA's James Webb Space Telescope spotted something Hubble missed
With its infrared gaze, the James Webb Space Telescope can capture galaxies, planets, moons, and auroras that Hubble can't detect.
Creepy close-up images of the sun reveal yarn-like strands, dark pores, and a 'light bridge' crossing a decaying sunspot
The sun looks spooky and incomprehensible in new up-close images from the world's most powerful solar observatory.
25 photos of space that could change the way you see our universe and make you feel very small
NASA telescopes and probes image planets' secret rings, black holes, cosmic dust clouds full of baby stars, and galaxies near the beginning of time.
Photos released by NASA show once-invisible spiral galaxies and a first look at star formation
Astronomers captured newly released photos of inside the heart of spiral galaxies with infrared light, which is invisible to the human eye.
NASA videos reveal explosive events on the sun: a polar vortex of plasma, an X flare, and an eruption from the north pole
NASA first caught a strange polar vortex on the solar north pole. A big eruption and flare followed, as the sun builds to maximum activity.
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The green comet and Mars appear side-by-side this weekend. Spot them together in the night sky.
A green comet and the red planet debut in a colorful showdown this weekend. You can easily find them in the sky, or watch online.
See the rare green comet in pictures so you know what to look for in the sky
Night-sky photography is offering a sneak peek at the green-comet spectacle you could spy with binoculars or a telescope on February 2.
We could be the last humans to see the green comet passing Earth for the first time since the Ice Age. Here's how, where, and when to watch it.
Bright green Comet ZTF may be visible to human eyes for the last time ever. Here's how, when, and why to watch it, from anywhere on Earth.
Ghostly flying 'whirlpool' that appeared above Hawaii could be leftover SpaceX rocket fuel
Video footage shows a strange blue whirlpool flying over Hawaii, then breaking apart, shortly after a SpaceX rocket launch.
Hubble vs. Webb: New NASA telescope reveals never-before-seen details from the early universe, within 400 million years after the Big Bang
Astronomers thought Hubble was showing them a single galaxy from the beginning of the universe. But JWST revealed it to be two mysterious objects.