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What is earthshine?

When you see the crescent moon after sunset this week, notice the pale glow on its unlit portion. This glow is called earthshine.

Merging galaxies behaving strangely

When large and small galaxies merge, the large galaxy’s central black hole typically gorges on gas and dust. But in a merging galaxy system called Was 49, the small galaxy has the feeding black hole.

Watch SpaceX rocket launch on Thursday

This milestone SpaceX launch is currently scheduled for March 30 at 6:00 p.m. EDT (22:00 UTC). Links to the live launch here.

Watch spacewalk on Thursday

Two ISS astronauts will be outside the space station beginning about 8 a.m. EDT (12:00 UTC) on March 30. The spacewalk is expected to last about 6.5 hours. Links to live viewing here.

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What is a Dyson sphere?

Are some advanced civilizations in our galaxy now collecting all of the energy emitted by their stars? If so, we would call their energy-collecting megastructures Dyson spheres.

Watch for young moon this week

The Americas and points westward might see the moon Tuesday evening, March 28. The rest of the world probably has to wait until Wednesday. Worth the wait! Very beautiful.

Watch a full rotation of the moon

Wonderful video from the Lunar Reconnaissance Orbiter, a NASA spacecraft in a polar orbit around the moon since 2009. The moon as you’ve never seen it!

Today in science: Great Alaska earthquake

The earthquake – centered in Prince William Sound off the coast of south-central Alaska – was the most powerful yet recorded in North America at magnitude 9.2.

Another Planet 9 search! You can help

This one will use images of the sky visible from Earth’s Southern Hemisphere. You can help from anyplace on the globe. The search is for a 9th major planet in our system, nicknamed Planet 9.

New moon is March 27 or 28

New moon comes March 28, 2017 at 02:57 UTC (evening of March 27 for the Americas).

Super halos around very young galaxies

Astronomers directly observed a pair of Milky-Way-like galaxies, seen when the universe was 8% of its current age. They were excited to find the young galaxies surrounded by huge halos.

So long, last North American ice sheet

The last remnant of a once-enormous ice sheet will be gone in about 300 years, according to a new study. Scientists say warming temperatures are the reason.

Where’s the moon? Waning crescent

A waning crescent moon is sometimes called an old moon. It’s seen in the east before dawn. Next new moon is March 28 at 02:57 UTC.