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Barred Spiral Galaxy

The barred spiral galaxy - NGC 1300
Credit: NASA/HST

A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure made of stars.

Bars are found in around half of all spiral galaxies, and appear to influence the motions of stars, dust and gas. It is believed that bars act a bit like a funnel, by pulling matter into the bulge from the disk. This leads to central bursts of star formation.

Recent studies suggest that bars are more common now than they were in the distant past, suggesting that they are a sign of maturity. Thus galaxies with bars are thought to be more evolved that those without, and are an important stage on the galaxies transition to become an elliptical galaxy.

Observations of our own galaxy, the Milky Way, suggest that we live in a spiral galaxy with a peanut-shaped bar feature.

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Please note that over the weekend of the 26-29th May 2017 we will be switching over to our brand new website - during this time there may be periods where the site is difficult to access, and users will be unable to request observations from the telescope. Please bear with us during this time. All should be back up and running by the 30th May 2017.