Zooming in on the globular star cluster Messier 54

This video takes you on a journey past the centre of the Milky Way and far out the other side to the globular cluster Messier 54. This cluster looks very similar to many others, but it has a secret. Messier 54 doesn’t belong to the Milky Way, but actually is part of a small satellite galaxy, the Sagittarius Dwarf Galaxy. The final close-up view comes from the VLT Survey Telescope at ESO’s Paranal Observatory in northern Chile.