Posts by 

Deborah Byrd

Celestial ocean: The watery constellations in the autumn sky

In Northern Hemisphere autumn (Southern Hemisphere spring), you can see some constellations representing a "celestial ocean in the sky" to early stargazers.

Alpheratz belongs to Andromeda, but is part of the Great Square

Alpheratz appears to our eyes as a single star but it is actually a close binary star system. Many stargazers use it to locate the Andromeda galaxy.

Cassiopeia the Queen is overhead on autumn evenings

Spot the constellation Cassiopeia the Queen somewhere in the northern sky during much of the year, and throughout much of the night. It's high overhead now.

LIVE on Monday: Super Blue Moon

Join EarthSky team members LIVE beginning at 12:15 p.m. (17:15 UTC) on Monday, August 19, 2024 ... to talk about Monday night's Super Blue Moon.

LIVE on Monday: What’s Phil thinking of NOW? GAIA

What's Phil thinking? Join Phil Plait, The Bad Astronomer, beginning at 12:15 p.m. central (17:15 UTC) on Monday, August 12 ... to hear him talk about GAIA.

LIVE ON MONDAY: It’s time for the Perseid meteor shower!

Meteor experts will be answering your questions LIVE in EarthSky's weekly livestream, beginning at 12:15 central (17:15 UTC) on Monday, August 5. Join us!

Want to find the Andromeda galaxy? Here are 2 ways

Find the Andromeda galaxy on dark, moonless skies from now until the beginning of northern spring. Here are 2 ways to find it.

May’s solar storm created a new Van Allen belt

May's solar storm added a new ring - a 3rd Van Allen radiation belt - to Earth. This new Van Allen belt might last from months to years.

What is a planet? Jean-Luc Margot wants a new definition

What is a planet? Under the 2006 definition for "planet," Pluto lost full planet status. Learn about a proposed new definition.

Astronomer Michael Brown: ‘I killed Pluto. Now I’m searching for Planet 9’

Cool astronomy livestream on Monday, July 14! EarthSky's Deborah Byrd will be talking with astronomer Michael Brown, who calls himself "the man who killed Pluto."