Posts by 

Deborah Byrd

2015 Antarctic sea ice extent

For the past three years, Antarctic sea ice at maximum set records. This year, that didn't happen, and a sea ice scientist called it "a return toward normalcy."

Hottest, heaviest touching double star

Astronomers say the two stars might be heading for catastrophe. They will likely either merge to create a single giant star or form a double black hole.

A possible – not likely – alien megastructure

KIC 8462852 is an oddly dimming star - 1,500 light-years away. It might or might not be surrounded by vast megastructures in space, built by aliens.

Best photos: This weekend’s planets before dawn

Venus is the brightest one up before dawn, but Mars and Jupiter were closer on Saturday than they will be again until 2018. Plus many people caught Mercury!

Is this region empty of stars?

Meet the Coalsack Nebula, a cloud of dust and gas in space - birthplace for new stars. In millions of years, the Coalsack's stars will light up and shine brightly.

Close encounters with Enceladus begin today

The flybys are part of a series of "lasts" for Cassini, whose mission to Saturn ends next year. Last chance for many years to see new up-close views of this fascinating, geologically active Saturn moon.

Galaxy halos more common than thought

Astronomers studied 35 galaxies with a newly upgraded radio telescope in New Mexico to learn more about galactic halos. This study confirms a 1961 prediction.

Full spectrum shooting star

You'll see the colors of a rainbow in this meteor ...

Two very different Saturn moons

One moon is small and irregular, and the other is larger and round. These two moons typify the sorts of objects you see throughout our solar system.

Seeing a jet’s shock wave

If you could see the shock wave from a jet moving faster than sound, this is what it would look like.