Scientists to monitor skies for UFOs

UFODATA wants to make UFO studies a more rigorous science and deploy a global network of automated surveillance stations to watch for UFOs full-time.

Update: 2015 TB145 likely a dead comet

Last week heralded as largest known asteroid to pass Earth until 2027. Swept within 1.3 times the moon's distance on October 31. Now thought to be a comet!

Black hole flares from puzzling coronas?

A black hole may flare when its corona - a mysterious source of highly energetic particles - launches away from the hole at close to 20 percent of light speed.

Cassini flyby of Saturn moon Enceladus

Cassini has swept through the towering plume of ice, water vapor and organic molecules spewing from Saturn's moon, Enceladus. Seven key facts, here.

Watch spacewalk live October 28

Watch two NASA astronauts make their first spacewalk outside ISS today, beginning at 8:10 a.m. EDT (12:10 UTC) until about 2:40 p.m. EDT (18:10 UTC).

New Horizons aiming toward next target

On Sunday, the craft that explored Pluto successfully executed the 2nd of 4 maneuvers designed to aim it toward a small Kuiper Belt object called 2014 MU69.

Ice cores confirm colossal solar storms

Evidence that Earth was hit by two solar storms - 10 times larger than those observed recently - 1,000 years ago. If they occurred today, they'd have devastating effects on power supplies, satellites and communications.

SOHO’s thousands of doomed comets

SOHO - Solar and Heliospheric Observatory - is the greatest comet-discoverer of all time. It has found 3,000 comets ... but our sun has destroyed nearly all of them.

Kerberos images complete Pluto family portrait

Images of Pluto's tiny moon Kerberos recently downlinked from New Horizons spacecraft. We now have images of all five Pluto moons.

Milky Way photo with 46 billion pixels

It's the largest astronomical image of all time, used by astronomers in the search for distant exoplanets and multiple star systems.