News tagged with northern hemisphere

A naked eye nova erupts in Centaurus

If you live in the southern hemisphere, the southern sky constellation of Centaurus may look a little different to you tonight, as a bright nova has been identified in the region early this week. ...

Dec 05, 2013
4.8 / 5 (6) 0 | with audio podcast

When the Sahara turned to sand

The Sahara wasn't always a desert. Trees and grasslands dominated the landscape from roughly 10,000 years ago to 5,000 years ago. Then, abruptly, the climate changed, and north Africa began to dry out.

Nov 11, 2013
4.5 / 5 (13) 4

Asteroid Vesta's mysterious olivine

(Phys.org) —Just when scientists thought they had a tidy theory for how the giant asteroid Vesta formed, a new paper from NASA's Dawn mission suggests the history is more complicated.

Nov 07, 2013
4.9 / 5 (13) 21 | with audio podcast

How to foresee US heat waves

Scientists have fingerprinted a distinctive atmospheric wave pattern high above the Northern Hemisphere that can foreshadow the emergence of summertime heat waves in the United States more than two weeks ...

Oct 27, 2013
4.5 / 5 (6) 2 | with audio podcast