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These sea turtles use magnetic fields like GPS

“They might not always make it back to the exact beach where they were born, and instead might opt for beaches with similar magnetic properties, as if their internal GPS has just slightly mixed up addresses.”

Do we all see the same moon phase?

One Earth. One sky. One moon phase (more or less) from all of Earth. So why (and how) does the moon look different from different parts of Earth?

1st deep-space CubeSats ready for launch to Mars

Riding along with the Mars InSight mission, the 2 briefcase-sized CubeSats are designed to demonstrate nearly real-time communications between worlds.

Mars brighter in 2018 than since 2003

Mars is getting brighter. By mid-2018, Mars will be at its brightest since 2003, when it was closer and brighter in our sky than in some 60,000 years.

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How TESS will hunt for alien worlds

Launched last week, TESS will scan 200,000 close and bright stars, seeking new planets and possibly livable worlds. Here’s a roundtable discussion with 2 scientists on the TESS mission.

Why observe Earth Day on April 22?

April 22 is the date of Earth Day in part because of Arbor Day, an earlier observance. The focus of Earth Day 2018 is plastic pollution.

This Pacific island is the most plastic-polluted place on Earth

On this Earth Day, explore remote, uninhabited Henderson Island in the South Pacific. It may look idyllic from above, but is littered with millions of tons of plastic.

Our home world from afar

Celebrate Earth Day with these 10 images of Earth from space.

Lyrid meteor shower: All you need to know

In 2018, April 22 is the peak morning. The moon, near the 1st quarter phase, is out of the way. Expect 10 to 20 meteors per hour at the peak.

Find the Lyrid meteors’ radiant point

You don’t need to find the radiant to see the meteors. But it’s fun to spot, near the bright star Vega.

April 21 is Astronomy Day

A beautiful chart from astronomer Guy Ottewell, showing the evening sky on Astronomy Day 2018. Plus links to Astronomy Day events and other info.

Latest snow on record for thousands of US locations

What’s the latest date that measurable snow has fallen in different parts of the United States? Check this interactive map from NOAA to find your record latest snow.

1st quarter moon is April 22

This 1st quarter moon will offer gorgeous telescopic views for those taking part in Astronomy Day. Then it’ll conveniently set, leaving the sky dark for this weekend’s Lyrid meteors.