Peering toward the Cosmic Dark Ages

During the Cosmic Dark Ages, our universe matured from a primordial soup of neutral gas to the star-filled cosmos we see today. A new study probes this mysterious time.

No commands to Mars craft in late July

NASA says to blame the sun for its moratorium on sending commands to Mars from July 22 to August 1.

Strange radio signals from nearby star

A 10-minute observation in May of nearby star Ross 128 yielded a peculiar radio signal. Further observations planned for Sunday night.

Last survivors on Earth?

Scientists say they’re likely to be tardigrades - tiny, 8-legged marine creatures - which can survive until the sun dies, long after we humans have disappeared.

Planet 9 hypothesis alive and well

Is there an unknown, massive planet on the fringes of our solar system? New work that claims to remove "observational bias" also supports this very exciting possibility.

Big sunspot at sunset

Neeti Kamthekar captured this photo of the lone sunspot that's been making its way across the sun in recent days. In reality, the sun's own spin is causing its apparent movement.

Massive iceberg breaks off Antarctica

An iceberg - about the size of the U.S. state of Delaware - split off from Antarctica’s Larsen C ice shelf sometime between July 10 and 12.

Wow! Juno’s super-close Red Spot images

Raw images from the Juno spacecraft's extremely close sweep past Jupiter's Red Spot are beginning to come in. NASA invites you to help process them!

Possible new threat to Earth’s ozone layer

Recent increases in an unregulated ozone-depleting substance could delay recovery of Antarctic ozone levels by 5–30 years, say scientists.

Astronomers find the smallest star yet

This star is just a sliver larger than Saturn, not even the largest planet in our solar system. Yet it's massive enough to shine as a star, and its pull of gravity is some 300 times stronger than Earth's.