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Thread: Three times further away than it is old?

  1. #1 Three times further away than it is old? 
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    http://antwrp.gsfc.nasa.gov/apod/ap101103.html

    According to the article in the above link describing the picture, the nebula is approximately 15,000 light years away. Which would mean that it took the light from that nebula, 15,000 year to reach us, right? But in that same article it says that astronomers estimate the age of the nebula to be only 5,000 years. How can the light from the nebula be visible from Earth if it is only 5,000 years old? Wouldn't the light need 10,000 more years to reach us?

    I am likely naive to some principal of cosmology which allows for this to be accepted, but it just doesn't make sense to me right now. One of them must be wrong, unless like I said I simply don't know about something.

    Anyone out there help shed some light on this for me?


    Always minimize the variables.

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  3. #2  
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    Yes.

    The article is a little sloppy. They mean "as observed" when they say the ring is 5000 years old, meaning it actually formed 20,000 years ago.


    Meteorologist/Naturalist & Retired Soldier
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  4. #3  
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    Oh okay. Yeah now that you say it that way it makes a lot of sense. Thanks.
    Always minimize the variables.

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