NASA's Messenger spacecraft has beamed back some surprising new data from the planet Mercury. Highlights include a weird crater nicknamed "the Spider," a planetary tail of hydrogen atoms, and measurements that show giant Caloris basin is even bigger than researchers thought.
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The two brightest planets are converging for a beautiful close encounter on Friday morning, February 1st.
NASA is preparing to launch a new space telescope named GLAST to study the most violent explosions in the history of our Universe.
Last week's historic flyby of Mercury by NASA's MESSENGER spacecraft gathered 500 megabytes of data and more than a thousand high-resolution photos covering nearly six million square miles of previously unseen terrain.
A cutting-edge laboratory has opened in Alabama. Its mission: to combat diseases ranging from asthma to malaria to stroke using data from NASA satellites. Space scientists and public health officials are working together to train the doctors of tomorrow in this far-out approach to medicine.
Images from NASA telescopes are jewels of the space program, marvelous to behold. But how do you behold them when you can't see? The answer lies between the covers of a new NASA-funded book written in Braille, Touch the Invisible Sky.
At a pivotal moment of the solar cycle, the NASA/ESA Ulysses spacecraft is flying over the sun's mysterious North Pole.
Hang on to your cell phones, a new solar cycle is underway. Solar Cycle 24 began last week with the appearance of a magnetically "backward" high-latitude sunspot.