A NASA spacecraft has spied what appears to be an inactive volcano on the surface of Ceres, the largest object in the asteroid belt between Mars and Jupiter.
Jupiter takes center stage with the arrival next week of a NASA spacecraft built to peek through its thick, swirling clouds and map the planet from the inside out.
In a NASA interview before heading home to Houston, where he arrived early Thursday, Scott Kelly said it was "amazing" to feel the cold air when the hatch of his Soyuz capsule popped open after touchdown.
On Sunday afternoon, astronaut Scott Kelly tweeted a picture of the moon from his seat aboard the International Space Station. It will likely be the last photo he takes of the moon, at least until he returns to Earth on March 1.
Today is the thirtieth anniversary of the Challenger Explosion, witnessed by millions on live TV. It is still one of the worst accidents in the history of the American space program.