Posts by 

Deborah Byrd

Night sky as Milky Way and Andromeda galaxies merge

As seen on Cosmos ... the collision and merger between our Milky Way galaxy and the nearby Andromeda galaxy 4 billion years from now.

Saturn’s largest and second-largest moons

The Cassini spacecraft captured this image on June 16, 2011. These are two of Saturn's moons - the largest moon Titan and second-largest moon Rhea.

Video: Are we loving manatees to death?

Manatee season at the Crystal River National Wildlife Refuge in Florida is November 1 to March 31. You can almost imagine the manatees breathing a sigh of relief.

Death of a snowflake

On the first day of spring for us in the Northern Hemisphere, check out this series taken yesterday of a snowflake, melting. Happy spring, everyone!

Amazing green flash atop sun pyramid

The green flash is an optical phenomenon you can see shortly after sunset or before sunrise. For a second or two, the upper rim of the sun flashes green.

Almost snack time for our galaxy’s supermassive black hole

Telescopes around the world are turning to our galaxy’s center, to watch our Milky Way's supermassive black hole consume a gas cloud.

Last night’s moon, planet Mars, star Spica

Cath Cooper - and others in EarthSky's community - caught last night's beautiful waning gibbous moon, red planet Mars and blue-white Spica, brightest star in Virgo.

Sunset over the Ligurian Sea

The Ligurian Sea is part of the Mediterranean Sea. It's between the Italian Riviera and the island of Corsica.

Mars!

The best time to see Mars in two years is here. Check out these great telescopic images of the planet and its moons, taken last week.

Cosmos is coming Sunday night

If you watch this three-minute long trailer for the new Cosmos without wanting to tune in to the whole series ... you are made of sterner stuff than me.