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September 19, 2011

Milky Way's spiral arms

Recently, at University of California, astronomers found out that the Milky Way's spiral arms are the product of an intergalactic collision course (it helps if you see the photo in the link below). Approximately two billion years ago, a small neighboring galaxy called Sagittarius dwarf galaxy and the disc of Milky Way galaxy have collided. It says that the stars in the Sagittarius dwarf galaxy were torn with the collision and because those stars were attracted to our Milky Way galaxy's strong gravity, it made a stream of stars (spiraling arms).
"The Sagittarius galaxy is due to strike the southern face of the Milky Way disk fairly soon, Purcell said — in another 10 million years or so." - Quoted from the article.
Link: http://www.astronomy.com/News-Observing/News/2011/09/Milky%20Ways%20spiral%20arms%20are%20the%20product%20of%20an%20intergalactic%20collision%20course.aspx

Posted by buruken at September 19, 2011 08:35 PM


The shape of the Milky Way is yet another example of the amazing results from countless rolls of the cosmic dice. This along with the most recent discovery of the planet orbiting two suns should make any reader think about the celestial wonders that lie in the vast void of space.

Posted by: jeffsong at September 20, 2011 11:15 PM

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