This star-churning dwarf galaxy is a tasty cosmic morsel

Fitting that this juicy piece of eye candy from the Hubble Space Telescope captured a starburst, a brief and intense star-forming period for a galaxy.

Say hello to NGC 1705, a dwarf galaxy about 17 million light-years from Earth in the southern constellation Pictor, the “painter’s easel.” NGC has produced many young stars outside the galaxy’s core, as well as the central giant star cluster.

It is petite, oddly shaped, and has recently spawned a bounty of stars. NASA and the European Space Agency released the snapshot last week.

This galaxy has been churning out new stars its entire life, but it kicked into high gear as recently as 26 to 31 million years ago. That’s not long relative to the estimated age of the universe, nearing 14 billion years. During starbursts, the stellar birth rate can be tens to hundreds of times greater than in typical spiral galaxies.

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Astronomers like to study dwarf irregular galaxies because they can give valuable insight into the early history of the universe: They tend to have little more than hydrogen or helium in the way of elements and are thought to be similar to the oldest galaxies ever formed.

The new Hubble Space Telescope image of dwarf galaxy NGC 1705, top, provides more depth and detail of the starburst than the observatory’s previous camera, used to take the 1999 photo, bottom.
Credit: Top: ESA/Hubble & NASA, R. Chandar; bottom: NASA, ESA, and The Hubble Heritage Team (STScI/AURA);