A new analysis of 13 supernovae — including archived data from NASA’s Hubble Space Telescope — is helping astronomers explain how some young stars exploded sooner than expected, hurling them to a lonely place far from their host galaxies. It’s a complicated mystery of double-star systems, merging galaxies, and twin black holes.
An international team of astronomers has used a highly sensitive instrument on one of the world’s largest telescopes to witness a dominant galaxy, Messier 81 in Ursa Major, ingesting the stars of its near neighbours. The gravitational pull of M81 was shown to distort the shapes of adjacent galaxies, pulling their stars into long tails in a process called tidal stripping.
Astronomers using the several of the largest telescopes on Earth and in space have discovered CR7, a galaxy three times brighter than the brightest distant galaxy in the early universe known up to now. The scientists also found strong evidence that examples of the first generation of stars lurk within it.