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The Milky Way’s long-lost sibling

Two billion years ago, the Andromeda galaxy – closest large spiral galaxy to our Milky Way – might have eaten another large galaxy.

Wow! New volcano on Jupiter’s moon Io

Io is small, but it’s the most volcanically active world in our solar system. It has hundreds of active volcanoes. Now the Juno spacecraft has found one more.

These spacecraft are studying Mars dust

Raging, planet-wide dust storms – like the one going on now – happen only every 6 to 8 years on Mars. Here’s how NASA spacecraft are studying it, plus a cool before-and-after video! 

Apollo and the moon-landing hoax

Why do people persist in denying that human beings landed on the moon?

Today in science: 1st footsteps on moon

Today is the 49th anniversary of humanity’s historic first steps on the moon. The story in pictures, here.

Is the moon toxic to humans?

When the Apollo astronauts returned from the moon, the dust that clung to their spacesuits made their throats sore and their eyes water. Lunar dust is made of sharp, abrasive particles, but how toxic is it for humans?

Astronomers discover 10 new moons for Jupiter

Most planets have moons, and Jupiter already had the most. Now, with these new ones, Jupiter has a whopping 79 moons altogether … so far.

Listen as Saturn and its moon interact

Spacecraft observations reveal plasma waves moving from Saturn to its rings and its moon Enceladus. Researchers converted a recording of the plasma waves into an audible cosmic whoosh that you’ll enjoy.

Astronomers find ‘ghost dunes’ on Mars

Robot orbiters circling Mars have acquired images of ghost dunes. They’re pits where, scientists believe, tall crescent-shaped sand dunes once existed on this red desert world.

Innovative new instrument to seek habitable worlds

A new infrared instrument on a telescope in Hawaii will let astronomers find more exoplanets orbiting red dwarf stars. The discoveries may include rocky worlds that are potentially habitable.