NASA Hubble spots star clusters on collision course

Astronomers have caught two clusters full of massive stars that may be in the early stages of merging.

Hubble solves mystery of ghost galaxies

For many years, astronomers have been trying to find out why some puny, extremely faint dwarf galaxies spotted in our Milky Way galaxy’s back yard contain so few stars.

Rare gravitational arc spotted behind distant, gigantic galaxy cluster

Using NASA’s Hubble Space Telescope, astronomers have found a puzzling arc of light behind an extremely massive cluster of galaxies residing 10 billion light-years away.

Astronomers discover 2 hidden alien planets

Astronomers have tracked two elusive extrasolar planets that went undetected in image data from NASA’s Hubble Space Telescope for 13 years.