Hubble and Gaia Team Up to Measure the Mass of the Milky Way

The mass of the Milky Way Galaxy is a question that has long puzzled astronomers and astrophysicists. Estimates ranged from between 500 billion to three trillion times the mass of our Sun. A new study looked at globular clusters, groupings of a million or so stars surrounding the Milky Way. By measuring the velocity at which they circled our galaxy, as measured by the Hubble Space Telescope and the Gaia Telescope, astronomers determined the Milky Way has a mass around one-and-a-half trillion times as great as our Sun.

Read More Hubble and Gaia Team Up to Measure the Mass of the Milky Way
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Hubble Discovers Dwarf Galaxy Playing ‘Where’s Waldo’ in Our Own Backyard

Astronomers using the Hubble Space Telescope accidentally found a previously-unknown galaxy, 28 million light years from Earth. This family of stars was found while researchers photographed the globular star cluster NGC 6752. Dubbed Bedin 1, this small, dim galaxy is believed to be around 13 billion years old, leading astronomers to describe it as a “living fossil” of the ancient Universe.

Read More Hubble Discovers Dwarf Galaxy Playing ‘Where’s Waldo’ in Our Own Backyard