US tornado frequency shifting eastward

Although Tornado Alley is still tops, vulnerable regions east of the Great Plains are catching up, according to a new study.

Meteors over Montana

The Orionid meteor shower peaked last weekend, and many of the meteors were drowned in bright moonlight. But John Ashley managed to catch a few dozen in the narrow window between moonset and dawn Sunday morning.

Full Hunter’s Moon on October 24

Today - October 24, 2018 - is the Northern Hemisphere's full Hunter's Moon.

EVE and Wall-E have Mars in their sights

The MarCOs - 2 briefcase-sized CubeSats accompanying NASA’s InSight spacecraft - are chasing Mars as it orbits the sun. Along the way, they've captured the 1st-ever CubeSat image of Mars!

Astronomers spy 4 giant planets orbiting a very young star

Finding 4 giant planets orbiting another star isn't too unusual these days. But these massive planets are the largest known to orbit such a young star - CI Tau - only 2 million years old.

Venus is going, going …

Venus will sweep between us and the sun (inferior conjunction) on October 26. Check out this photo - taken just 5 days before inferior conjunction - of Venus as a slim crescent world.

Waxing toward full Hunter’s Moon

Tonight - October 23, 2018 - the moon is waxing for all of us, around the globe. If you're in the Northern Hemisphere, it's waxing toward a full Hunter's Moon and the second full moon of autumn. If you're in the Southern Hemisphere, the moon is waxing toward your second full moon of springtime.

Our Milky Way almost collided with another galaxy

Astronomers found a snail-shaped substructure of stars in our larger Milky Way galaxy. It indicates the Milky Way is still enduring the effects of a near-collision that set millions of stars moving like ripples on a pond.

Big Dipper over Grand Gulch, Utah

The Big Dipper over a pool in the Utah desert, caught from a canyon littered with the rock art and ruins of Ancestral Puebloans.

How Earth feeds volcanic supereruptions

To better understand where magma gathers in Earth’s crust, researchers studied the Taupo Volcanic Zone of New Zealand, the planet's most active cluster.