News tagged with northern hemisphere

Noctilucent clouds get an early start

Every summer, something strange and wonderful happens high above the north pole. Ice crystals begin to cling to the smoky remains of meteors, forming electric-blue clouds with tendrils that ripple hypnotically ...

Jun 10, 2013 5 / 5 (2) 0 | with audio podcast

How the ice ages ended

A study of sediment cores collected from the deep ocean supports a new explanation for how glacier melting at the end of the ice ages led to the release of carbon dioxide from the ocean.

May 01, 2013 4.5 / 5 (24) 48 | with audio podcast

Comet Lemmon, Now in STEREO

An icy interloper was in the sights of a NASA spacecraft this past weekend. Comet 2012 F6 Lemmon passed through the field of view of NASA's HI2A camera as seen from its solar observing STEREO Ahead spacecraft. ...

Apr 25, 2013 5 / 5 (2) 0