News

Satellite galaxies not randomly arranged

2 February 2018 Astronomy Now

New observations indicate dwarf galaxies may not orbit their parent galaxies in random alignments as predicted by dark matter computer models. Instead, satellite galaxies orbiting in more ordered planes may be the rule, not the exception.

News

The dark side of globular star clusters

14 May 2015 Astronomy Now

Observations with ESO’s Very Large Telescope in Chile have discovered a new class of “dark” globular star clusters around the giant galaxy Centaurus A. These mysterious objects look similar to normal clusters, but contain much more mass and may either harbour unexpected amounts of dark matter, or contain massive black holes — neither of which was expected nor is understood.