Galaxy UGC 4879 in Ursa Major: "A Mysterious Hermit" | Hubble

Galaxy UGC 4879 in Ursa Major: "A Mysterious Hermit" | Hubble

The drizzle of stars scattered across this image forms a galaxy known as UGC 4879. It is an irregular dwarf galaxy—as the name suggests, galaxies of this type are a little smaller and messier than their cosmic cousins, lacking the majestic swirl of a spiral or the coherence of an elliptical.

This galaxy is also very isolated. There are about 2.3 million light years between UGC 4879 and its closest neighbor, Leo A. This is about the same distance as that between the Andromeda Galaxy and the Milky Way.

Distance from Earth: ~4 million light years

This galaxy’s isolation means that it has not interacted with any surrounding galaxies, making it an ideal laboratory for studying star formation uncomplicated by interactions with other galaxies. Studies of UGC 4879 have revealed a significant amount of star formation in the first 4-billion-years after the Big Bang, followed by a strange nine-billion-year lull in star formation, ended 1-billion-years ago by a more recent reignition. The reason for this behavior, however, remains mysterious, and the solitary galaxy continues to provide ample study material for astronomers looking to understand the complex mysteries of starbirth throughout the Universe.

The Hubble Space Telescope is a joint ESA/NASA project and was launched in 1990 by the Space Shuttle mission STS-31 into a low-Earth orbit 600 km above the ground. During its lifetime Hubble has become one of the most important science projects ever.

Image Credit: NASA & European Space Agency (ESA)
Release Date: June 6, 2016

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