Posts by 

Deborah Byrd

Fogbow over Massachusetts

Because of the small size of water droplets in fog, a fogbow might have only very weak colors, or no color at all. Colorless fogbows are sometimes called white rainbows.

Merging galaxies can produce disk galaxies

Astronomers thought mergers formed giant elliptical galaxies. Now, for at least 24 observed galaxies, mergers have formed flattened, circular disks of dust and gas.

Earthquake-induced landslide at Seward Glacier

NASA scientists were in the right place at the right time this summer to capture photos of a fresh landslide, caused by an Alaska earthquake.

New catalog of visible Milky Way charts 219 million stars

Astronomers spent 10 years charting stars brighter than 20th magnitude – that's about 1 million times fainter than can be seen with the human eye.

Hurricane Odile

Hurricane Odile tied Olivia (1967) as the strongest hurricane to make landfall in Baja California in the satellite era.

Favorite photos of September 12 aurora

Two powerful storms on the sun this week resulted in beautiful displays of the aurora borealis, or northern lights, that dipped down as far as the northern U.S.

First evidence for water-ice clouds outside our solar system

The first evidence for water-ice clouds on an object beyond our solar system. It's a brown dwarf, one of our closest neighbors, only 7 light-years away.

Astronomers solve 20-year-old quasar mystery

New works suggests most observed quasar phenomena depend on two things: how efficiently a central black hole is being fed and the astronomer's viewing orientation.

Harvest Moon trilogy

This past full moon was the Northern Hemisphere's Harvest Moon, known for appearing entirely or nearly full for several nights in a row.

Home is behind, the world ahead

A mesmerizing view down a long, straight stretch of road, with a wild sky above.