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Editors of EarthSky

Moon formed from Earth collision with planet-sized body: New evidence

The theory that the moon formed when a planet-sized body named Theia crashed into Earth is supported by new evidence using samples from Apollo missions.

Light from huge explosion 12 billion years ago reaches Earth

Intense light from an enormous star explosion more than 12 billion years ago — shortly after the Big Bang — recently reached Earth and was visible in the sky.

Close-up views of large hurricane on Saturn

This massive hurricane at Saturn's north pole may have been churning for years.

Rosetta spacecraft watches target comet come alive

Later this year, the Rosetta spacecraft will orbit and land on Comet 67P/Churyumov-Gerasimenko. Here's an update, in this new NASA video.

NASA has re-scheduled its ‘flying saucer’ test flight

On Tuesday, NASA was going to drop a flying-saucer-shaped vehicle from a helium balloon high above Earth's surface, in preparation for future Mars missions. But the test has been delayed, due to weather.

Kepler-10 star system has a mega-Earth!

Astronomers believed a rocky world with 17 times Earth's mass couldn't form. But now they have discovered one.

Identify 500 birds with new Birdsnap app

Take a picture of a bird and identify it. This free new iPhone app is an electronic field guide featuring 500 of the most common North American bird species.

Flying airplanes with mind control

Researchers demonstrate that brain-controlled flight is possible.

An ancient battle: A 900-pound croc takes on a 58-foot snake

An ancient, 16-foot, 900-pound crocodile may have been overmatched by a monster snake that swam in the same rivers 60 million years ago.

New image of seafloor zone where Malaysia Airlines Flight 370 might lie

A new illustration of the seafloor, created by two of the world’s leading ocean floor mapping experts, details underwater terrain where the missing Malaysia Airlines flight might be located.