Posts by 

Deborah Byrd

40,000 feet over Greenland

A clear day over one of the world's two great ice sheets.

Global astronomy month begins April 1

April, 2016, is Global Astronomy Month 2016 (#GAM2016), organized by Astronomers Without Borders, whose motto is One People One Sky.

Notice the tilt in Saturn’s rings

You can see in this composite by Scott MacNeill that - in the past few years - Saturn's rings have been appearing increasingly open from our earthly perspective.

The extremely hot heart of quasar 3C273

Scientists combined telescopes on Earth and in space to learn that this famous quasar has a core temperature hotter than 10 trillion degrees! That's much hotter than formerly thought possible.

See it! Moon sweeps past Mars and Saturn

Both planets are up after midnight now, but soon will be rising earlier … at their best. Enjoy these photos from the EarthSky community!

Another record low for Arctic sea ice

At 5.6 million square miles, 2016 had the lowest winter sea ice maximum in the 37-year satellite record. It's slightly lower than the previous record, set last year.

Pavlof Volcano in Alaska erupts

Huge ash plume caused airline re-routings. Falling ash, volcanic lightning and lava fountaining from summit. By Tuesday morning, eruption was declining.

Moon and Empire State Building

A distant view of an iconic building, with the moon behind it.

Video of closest comet in 246 years

It's small, but, because it's so close to us, it appears to be moving very fast across our sky. Image and video by EarthSky community member Greg Hogan.

Moon’s tilt has changed over time

Did the 'man in the moon' look different from ancient Earth? Yes, according to new research showing that the moon has undergone what's called True Polar Wander.