What is a barred spiral galaxy?
Quick Answer
A barred spiral galaxy is a spiral galaxy with a central bar-shaped structure of stars. The Milky Way is one example.
The Full Story
Barred spiral galaxies have a central bar of stars crossing the nucleus, with spiral arms extending from the ends of the bar. Astronomers think these bars can channel gas inward toward the center, influencing star formation and black-hole feeding. The Milky Way is now classified as a barred spiral galaxy, along with many others in the universe. Their barred structure is visible in both nearby galaxies and in computer simulations of galactic evolution. These galaxies show how gravity organizes matter on enormous scales.
Key Facts
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Suggested video title for this topic:
"Why some spiral galaxies have a cosmic bar running through the middle"
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