ALTERNATE UNIVERSE A neighborhood of stars packed tightly together (illustrated) might heat interstellar space enough for an orphaned planet wandering nearby to have liquid water on its surface and, therefore, potential for life.
NASA/ESA and G. Bacon/STScI
GOING THE DISTANCE The most distant confirmed galaxy (blue) is seen as it was when the universe was 650 million years old in this image from the Hubble Space Telescope.
P. Oesch and I. Momcheva (Yale University), and the 3D-HST and HUDF09/XDF teams, NASA, ESA
EYE IN THE SKY A stellar nursery 20,000 light-years from Earth known as Westerlund 2 showcases the Hubble Space Telescope’s sharp vision in an image taken in honor of the observatory’s 25th anniversary.
NASA, ESA, S. Perlmutter/LBNL/UC Berkeley, A. Koekemoer/STScI, M. Postman/STScI, A. Riess/JHU, J. Nordin/LBNL/UC Berkeley, D. Rubin/Florida StateUniv., C. McCully/Rutgers Univ.