Friday, February 13, 2009
January SIN Stephen "Hold on to your Stars Ladies and Gentlemen"
In the article “Hold on to your Stars Ladies and Gentlemen” at http://www.blogger.com/www.sciencenews.org/view/generic/id/39836/title/FOR_KIDS_Hold_on_to_your_stars,_ladies_and_gentlemen, written by Stephen Ornes on Jan 14, 2009; scientists found that our galaxy is different than they originally thought. We live on earth. The earth goes around the sun. Scientists thought that our galaxy was half the size of Andromeda. They actually found out that our galaxy the Milky Way is about 50 percent bigger than Andromeda. They found out that the galaxy was spinning 100,000 miles per hour faster than they thought. Scientists are finding out that the bigger the galaxy the faster the galaxy spins. They are saying that the Andromeda galaxy and the Milky Way galaxy will eventually crash into each other but that won't happen for a long time. This helps us connect to real life by knowing that our galaxies will collide but not for a long time. I wonder if our galaxies will crash and into each other and become supernova.
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3 comments:
Is 100,000 miles per hour a large change or a small change? How fast do they think it was spinning before, compared to what they think now. In what kind of time frame is the collision going to occur, short like 3 or 4 billion years or more like 100 billion? How is the speed increase proportional to the size?
It is interesting that spin speed is proportional to size. I wounder why this is...
So, how fast is the Milky Way spinning compared to Andromeda, or any other galaxy?
where did you git the information
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