Posts by 

Deborah Byrd

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.

Planet X still doesn’t exist

Astronomers have searched for a Planet X for over a century. Now NASA's WISE mission suggests Planet X will never be found.

The chain fountain video is amazing

It's looks like a magic trick, but it's really a problem in the physics of everyday things.

Hubble Telescope sees asteroid mysteriously break in pieces

Asteroid P/2013 R3 has been caught in the act of breaking into pieces. This is the first time astronomers have seen an asteroid break up.

Another asteroid flies through Earth-moon system on Thursday

For the second time in two days, an asteroid is sweeping safely through the Earth-moon system. How to watch online.