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May 2, 2016

Are ocean asteroid impacts really a serious threat?

If a space rock were to hit the Earth at just the right location in the oceans, it could cause massive waves that could inundate U.S.

April 28, 2016

Surprise! Gigantic black hole found in cosmic backwater

One of the biggest black holes ever found sits in a cosmic backwater, like a towering skyscraper in a small town.

April 28, 2016

Minor lunar eclipse to darken part of Moon Wednesday: What to expect

Earth's shadow will darken part of the moon Wednesday morning in a lunar eclipse that will be visible from much of the globe, including central and western North America.

April 28, 2016

Leap day: The story behind this quirky calendar event

Monday is Feb. 29 — the bissextle or "leap day," an artifact that dates back to the year 46 B.C. Back then, Julius Caesar took the advice of the learned astronomer Sosigenes of Alexandria, who knew from Egyptian experience that the tropical year (also known as the solar year) was about 365.25 days in length.

April 28, 2016

NASA's next great space telescope: The quest begins

The hunt is on!

April 28, 2016

Pluto's blue bands get high-resolution makeover

Pluto's blue bands shine spectacularly in the highest-resolution image yet of the dwarf planet's atmosphere.

April 28, 2016

Babylonians tracked Jupiter with fancy math, tablet reveals

For a text that may rewrite the history of mathematics, it looks rather sloppy

April 28, 2016

How astronomers could actually see 'Planet Nine'

If Planet Nine really exists, astronomers have a pretty decent chance of spotting it.

April 28, 2016

Worldwide telescope network will take best-ever images of Black Holes

Get ready for your close-up, black holes: The Event Horizon Telescope (EHT), which will take some of the best images of black holes ever captured by humans, is ramping up its worldwide network of telescopes.

April 28, 2016

NASA's Kepler comes roaring back with 100 new exoplanet finds

NASA's Kepler spacecraft has bounced back nicely from the malfunction that ended its original exoplanet hunt more than two years ago.