Posts by 

Deborah Byrd

Once a day, Io’s atmosphere collapses

Jupiter's moon Io has active volcanos spewing gases into its thin atmosphere. As Io moves in and out of Jupiter's shadow, its atmosphere collapses and then repairs itself.

Star lashes companion with mystery ray

Astronomers thought the star AR Scorpii was a lone variable star. Now they realize it's a dwarf star bombarding its companion with relativistic electrons.

Time to see the starlit Milky Way

New moon is August 2, 2016. The next few evenings are a wonderful time to go out in the country for an edgewise view into our own galaxy, the Milky Way.

Why no young stars at Milky Way center?

An international team of astronomers finds that that there's a large region around the center of our home galaxy that's devoid of young stars.

Solar eruption larger than Earth

Here is gas arching up from the surface of the sun, sculpted by the sun's magnetic fields. These great features are called prominences.

Earth’s shadow, sea and land

Earth's shadow is a blue-gray line ascending in the east each evening, as the sun sinks below the western horizon. Belt of Venus is a pink line above the shadow.

Watchers spy rare white whale Migaloo

Not all experts agree that the white whale spotted off Australia's east coast on Tuesday was the beloved Migaloo. But most are adamant it was.

Where are Ceres’ large craters?

There's a curious lack of big craters on the dwarf planet Ceres, largest body in the asteroid belt between Mars and Jupiter. Why?

New China telescope to search for aliens

A 1,600-foot (500-meter) dish called FAST - in southwest China - is now the world's largest radio telescope. It's expected to be fully operational in September.

Sky and Earth time-lapse, New Zealand

A new time-lapse video from New Zealand, showing both its dramatic landscape and the sky above. It's called "The Edge of Perception."