GPS used to improve weather forecasts

Australian scientists are employing GPS to make weather forecasting more accurate, with a new type of temperature profile observation.

Venus transit will help NASA improve future observations

NASA's NASA's Solar Dynamics Observatory (SDO) is hoping to use Venus's transit of the sun on June 5 to better calibrate its instruments.

Crab Nebula shocks scientists by dimming

The Crab Nebula  - long thought to be the most stable source of high energy radiation in the sky - has astonished astronomers by showing signs of dimming.