Astronomy Essentials
Large comet C/2017 K2 to pass Earth in July 2022
Comet C/2017 K2 (PanSTARRS) will brighten in our skies this summer. You can watch it with a small telescope for 4 months.
Today's Image
Rolling stones on Mars, seen from orbit
Rolling stones on Mars. An image from the ESA/Roscosmos ExoMars Trace Gas Orbiter shows a cliff-face on Mars. Boulders have rolled down the cliff.
Space

Watch 2022’s 1st spacewalk on January 19

On Wednesday, two Russian cosmonauts will venture outside the International Space Station to kick off 2022's 1st spacewalk. Here's how to watch it live.
Space

Photos and video of huge asteroid 1994 PC1. It passed Earth safely January 18

Huge asteroid - Asteroid 1994 PC1 - safely passed Earth on January 18, 2022. At its closest, it was 5 times farther than the moon. Video and photos here.
Brightest Stars

Blue-white Rigel is Orion’s brightest star

Blue-white Rigel shines as the brightest star in the constellation Orion the Hunter. It's a hot massive star in the latter stages of its stellar evolution.
Tonight

Orion the Hunter is easy to spot in January

Orion the Hunter is one of the easiest constellations to identify thanks to its Belt, the 3 medium-bright stars in a short, straight row at his waist.
Space

A gravitational wave background from giant black holes?

In its second data release in early January 2022, scientists with IPTA announced early glimpses of a gravitational wave background.
Constellations

Dorado and Mensa house the Large Magellanic Cloud

The constellations Mensa and Dorado are deep in southern skies. Between them, stretching across the border, lies the Large Magellanic Cloud.
Tonight

January’s full moon: Wolf Moon and 1st full moon of 2022

January's full moon is on January 17, 2022, and is nicknamed the Wolf Moon. Enjoy the full-looking moon for a night or two on either side of that night.
Earth

Australia ties its hottest temperature on record

Onslow, Australia, reached 50.7 C on January 13, 2022, tying its hottest temperature on record in the country and for the Southern Hemisphere.