The Dawn spacecraft, shown firing its ion propulsion engine in this artist’s illustration, is scheduled to begin orbiting the dwarf planet Ceres on March 6.
ON THE LOOSE Hypervelocity stars (one illustrated) travel so fast they can escape the galaxy. US 708 is the fastest known of this cohort, possibly ejected by a supernova explosion, astronomers say.
Ruth Bazinet, CfA
Gravity from a galaxy (box) in this Hubble Space Telescope image bends light from a more distant supernova, creating four images of the exploding star (arrows).
NASA, ESA, and T. Treu (UCLA), P. Kelly (UC Berkeley) and the GLASS team; S. Rodney (JHU) and the FrontierSN team; J. Lotz (STScI) and the Frontier Fields Team; M. Postman (STScI), and the CLASH team; and Z. Levay (STScI)