Posts by 

Deborah Byrd

Crescent moon with earthshine

The young moon is back after sunset, passing near Venus in the next few evenings. The pale glow on the darkened portion of the moon is called "earthshine."

Sunrise, morning haze, Grand Canyon

Nearly two billion years of geologic history can be seen in the canyon, exposed by flowing water and the uplift of the Colorado Plateau.

Comet ISON, post-perihelion

Has a remnant of Comet ISON survived the close brush with the sun?

Experience Comet ISON’s encounter with the sun online

ISON's moment of truth is here - its closest approach to the sun - today. Here are some ways to experience it online.

Comet ISON on November 28

The field of view of the SOHO mission's LASCO C3 now fully shows Comet ISON.

Best photos, images, videos of Comet ISON

Now ISON cannot be seen from Earth, but it's coming into the field of view of a whole fleet of ESA and NASA space-based observatories.

This is not Comet ISON, but it could be

There are rumors today that Comet ISON is breaking up as it nears its November 28 closest point to the sun. Here's what a disintegrating comet looks like.

Comet ISON nears the sun

Comet ISON is now inside the orbit of Mercury. It's on the last leg of its journey sunward, a journey that began at least a million years ago.

Moon, Jupiter, Orion last night

People around the world last night saw Jupiter near the moon. One sky ...

New evidence for jet from Milky Way’s black hole

The evidence comes in the form of high-energy particles blasting out of the supermassive black hole at the center of our galaxy.