Gallery of planetary nebulas from Chandra and Hubble

Our sun will become a planetary nebula, billions of years from now. So, in a way, looking at these images is like looking at our own sun's future.

Making sense of astronomical misconceptions

Shortly after posting my last blog, I was abducted by aliens who flew me to Thermoman's home planet of Ultron where I was taught secrets of the universe.

Probing Earth’s mysterious radiation belts

They're home to killer electrons, plasma waves, and intense electrical currents that can destroy satellites' electronics - and they're unpredicatable.

Satellite detects new black hole in our galaxy

The video in this post shows how NASA's Swift satellite made the discovery of a new black hole in our Milky Way, one of only about a dozen known.

If I had a boat, I’d sail Titan’s seas

On September 27, 2012, Spanish engineers presenting to the European Planetary Science Congress in Madrid proposed to send a boat to Titan.

Zoom in on the Seagull Nebula

Start with a broad view of the Milky Way and zoom in on Sirius, the constellation Orion ... then the distant Seagull Nebula - a dramatic star formation region.

Planet Nibiru is not real

Nibiru, sometimes called Planet X, is not going to collide with our planet this year - or ever - because it doesn't exist.

Deepest-ever view of the universe

Peering deeper into the universe than ever before, the eXtreme Deep Field was assembled using 10 years of Hubble Space Telescope observations.

Hot-gas halo surrounds our Milky Way, scientists say

NASA scientists estimate the mass of the hot-gas halo to be comparable to the mass of all the billions of stars in our Milky Way galaxy.

Video: Final flight of Space Shuttle Endeavour

Millions glimpsed and photographed Space Shuttle Endeavour on September 21, as it made its final aerial spin over California.