State-of-the-art computer simulations let scientists figure out why some galaxies are green. They said a green color for a galaxy might reveal a troubled past.
Plus the Dawn spacecraft will remain at Ceres, and 7 other NASA craft have the green light for continued operations through fiscal years 2017 and 2018.
Hundreds of events - films, concerts, panels with engineers, scientists and astronauts - about asteroids and how to protect our planet from asteroid impacts.
Juno spacecraft on approach to Jupiter! The craft will arrive at Jupiter on July 4, first spacecraft to orbit the giant planet since Galileo (1995-2003).