
This artist's conception illustrates Kepler-22b, a planet known to comfortably circle in the habitable zone of a sun-like star. It…
APOD Science APOD APOD: 2011 December 6 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss …

In 2004, an international team of astronomers had, for the first time, observed a stellar "survivor" emerge from a double…

So much of our modern technology is at risk from space weather, including satellites, communications and power grids.

Schematic illustration of the invisible magnetic field lines generated by the Earth, represented as a dipole magnet field.

This diagram compares our own solar system to Kepler-22, a star system containing the first "habitable zone" planet discovered by…

APOD Science APOD APOD: 2011 December 5 – A… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss…

APOD Science APOD APOD: 2011 December 4 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss …

APOD Science APOD APOD: 2011 December 3 – As… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss…

APOD Science APOD APOD: 2011 December 2 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss …