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Astronomers chart galaxy orbits in our Local Supercluster

“For the first time, we are not only visualizing the detailed structure of our Local Supercluster of galaxies, but we are also seeing how the structure developed over the history of the universe.”

What’ll happen when 3200 Phaethon sweeps past Earth?

This mysterious rock-comet is the parent body of this week’s Geminid meteor shower. It’ll brush closely past Earth on December 16, just a few nights after the Geminids’ peak. Will 2017 be a fantastic year for the Geminids?

Find the Geminid meteors’ radiant point

December’s Geminid meteor shower radiates from the constellation Gemini the Twins. To see it, look east in mid-evening or overhead by about 2 a.m.

California in flames

According to the California Department of Forestry and Fire Protection, the 2017 California wildfire season is the worst on record.

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Last quarter moon is December 10

Watch for the last quarter moon Saturday night after midnight or Sunday morning. The moon will be showing us half of its lighted half, or day side.

All the illions from Cosmos, in order

Why? Because we love Carl Sagan.

Audubon’s Christmas Bird Count starts December 14

Audubon Society’s Christmas Bird Count is one of the longest-running citizen science projects in existence. Here’s how to participate.

Why brighter stars at this time of year?

No matter where you are on Earth on December, January and February evenings, you’re looking toward bright stars in our local spiral arm.

Asperitas clouds over Tenerife

Meet Earth’s newest named cloud, the asperitas cloud, 1st new addition to the International Cloud Atlas in over half a century.

Don’t miss the Geminids in 2017

Meteor showers are part of nature and so inherently unpredictable. But the 2017 Geminids might be an awesome shower! Peak mornings December 13 and 14. Moon near morning planets. Parent body – 3200 Phaethon – nearby.

Turning hurricanes into music

A meteorologist and a music technologist are turning data from tropical storms into musical graphs. Can listening to storms help us understand them better?

Star of the week: Menkar

It’s not the most famous star in Cetus the Whale, or the brightest, although it carries the designation Alpha. But Menkar has its own claims to fame.

Giant black hole at cosmic dawn

Meet J1342+0928, now the most distant quasar yet known, containing the most-distant-yet supermassive black hole. Both exist at a time just 690 million years after the Big Bang.