NOAA releases 2018 Arctic Report Card

This year’s report shows that the Arctic region experienced the 2nd-warmest air temperatures ever recorded, the 2nd-lowest overall sea-ice coverage, and lowest recorded winter ice in the Bering Sea.

Exoplanet’s helium atmosphere is inflated like a balloon

Astronomers have discovered that a Neptune-sized exoplanet - HAT-P-11b - has an even larger helium atmosphere than first thought. The atmosphere is literally inflated like a massive balloon.

Don’t miss 2018’s brightest comet

Whether you glimpse it with the eye - or see it online - don't miss comet 46P/Wirtanen! Charts, tips and other info here.

See it! Images of comet 46P/Wirtanen

Look here for photos and video of 2018's Christmas comet and brightest comet, 46P/Wirtanen.

Adelaide sunset

Gordy Losic captured the December 6 sunset in Adelaide, South Australia. Thanks for sharing, Gordy!

Tiny droplets of early universe matter created

Researchers have created tiny droplets of the ultra-hot matter that once filled the early universe, forming 3 distinct shapes and sizes: circles, ellipses and triangles

Huge previously-undetected coral reef off US East Coast

Earlier this year, scientists were surprised to discover a huge forest of coldwater corals off the coast of South Carolina. A scientist aboard the expedition discusses the find.

Mars over a waterfall in Turkey

Basri Seckin said he set out to capture the Milky Way, but clouds got in the way. Then he realized he had this image of Mars.

Time to look for Mercury and Jupiter below Venus

Some people spotted Mercury days ago, but it's higher in the sky now and brighter. This is a good time to catch the most elusive planet.

Ancient water found on asteroid Bennu

NASA's OSIRIS-REx mission arrived at asteroid Bennu on December 3 and has already made a significant discovery about this small world.