Tool marks within the engraving suggest that it was likely created by someone who intentionally passed a sharp object again and again over the cave wall.

Deborah Byrd

September 2, 2014

Fav photos of August 31 moon, Saturn and Mars

Did you see the moon near the planets Saturn and Mars Sunday evening? Thanks to all EarthSky friends who captured and shared these beautiful images.

Deborah Byrd

September 1, 2014

What is the blue hour?

The blue hour - when the sun is some distance below the horizon, when the sky is deep blue and the landscape is suffused with bluish light - is a good time to take photos.

Deborah Byrd

August 30, 2014

NROA astronomers pin down distance to Pleiades stars

National Radio Astronomy Observatory astronomers used a tried-and-true method - stellar parallax - to resolve a controversy over the Pleiades' distance.

Deborah Byrd

August 28, 2014

Yellowstone supervolcano would cover North America in ash

It's highly unlikely a supervolcano will erupt at Yellowstone National Park. But, says a new study, if one did, volcanic ash would cover North America.

Deborah Byrd

August 27, 2014

Milky Way over Utah, and a moonlit blue hour

A crescent moon - just set below high, hardened sand dunes in Goblin Valley State Park in Utah - creates a kind of "blue hour" glow in the sky.

Deborah Byrd

August 26, 2014

Moon, Jupiter, Venus over Hong Kong

It was a glorious weekend for planet-watching. The moon waned and appeared lower in the east before dawn each day, sweeping past Venus and Jupiter.

Deborah Byrd

August 24, 2014

Deborah Byrd

Deborah Byrd (asteroid 3505 Byrd) helps edit EarthSky.org and is a frequent host of EarthSky videos. Deborah created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Prior to that, she had worked for the University of Texas McDonald Observatory since 1976, and created and produced their Star Date radio series. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named in her honor in 1990, a Public Service Award from the National Science Board in 2003, and the Education Prize from the American Astronomical Society in 2020. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.