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1st quarter moon is January 24

The moon will reach its 1st quarter phase on January 24 at 22:20 UTC. It’ll shine in the evening sky, looking half-illuminated, like half a pie.

Watch 1st spacewalk of 2018 on Tuesday

2018’s 1st spacewalk is apparently on! Live coverage has begun on NASA TV. A pair of NASA astronauts is scheduled to perform the January 23 spacewalk.

Tsunami warnings issued – later canceled – after powerful Alaska quake

A powerful earthquake struck 174 miles (280 km) southeast of Kodiak, Alaska, early this morning. Tsunami watches or warnings were issued – later canceled – for western North America and Hawaii.

Hubble Telescope finds substellar objects in Orion Nebula

Yes, the Orion Nebula is a star factory, but a new deep survey has revealed 17 brown dwarf companions to red dwarf stars, a brown dwarf pair, a brown dwarf with a planetary companion plus … 3 giant planets.

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Orion Nebula is a place where new stars are being born

Everything you need to know about the Orion Nebula. How to find it in your sky tonight. Plus … the science of this star factory in space.

Will Betelgeuse explode someday?

Yes, it will. Someday the star Betelgeuse will run out of fuel, collapse under its own weight, and then rebound in a spectacular supernova explosion. Someday … but probably not soon.

How far is Betelgeuse?

Finding star distances isn’t easy. Here’s how it’s done, and why astronomers modified the distance estimate to the famous star Betelgeuse.

50 years ago: Thule incident

On January 21, 1968, in what came to be known as the Thule incident, a U.S. jet carrying 4 nuclear bombs crashed in Greenland, spreading radioactive wreckage across 3 square miles of a frozen fjord.

Where’s the moon? Waxing crescent

The young moon is back in the evening sky, waxing toward a lunar eclipse on January 31.

NASA and NOAA: 2017 was record-setting for warmth

NASA says 2nd-warmest year on record. NOAA says 3rd-warmest. Their methodologies differ slightly, but – by both standards – the 2017 results make the past 4 years the hottest yet recorded.

Saturn moon Titan has a sea level

A new topographic map of Titan, plus a new study showing that Titan’s seas lie at an average elevation – a sea level – just as Earth’s do.

Why did passenger pigeons die out?

In the 19th century, passenger pigeons were so numerous that hunters competed to shoot as many as possible. But the last passenger pigeon died in the Cincinnati Zoo over 100 years ago. How did it all go so wrong?

How massive can neutron stars be?

Settling a long debate, astrophysicists at Goethe University Frankfurt now say neutron stars can’t exceed the mass of 2.16 suns.