93,284 subscribers and counting ...
A Hubble Space Telescope image showing dark clouds, called Bok Globules, floating through the IC 2944 star cluster. Sitting 6000 light-years from Earth, these clouds are sites of future star formation.
Dark interstellar clouds
Matt Daniel's WeatherGlobe
Major storm slamming California
Blogus scientificus by Alex Reshanov
Still no evidence for blood-type diet
Earth Trekker by Deanna Conners
Vote for best NASA Earth images of the year