- #1
twistedspark
- 22
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Am I misunderstanding the measurements or what? The SIMBAD site has archived 17 measurements or Vega's radial velocity over the past 150 years and they are all negative (blue-shifted) averaging out to about 9.0875 miles per second. Since Vega is only 25.29 lightyears away this seems to indicate that Vega and our star will be right on top of one another in 518,000 years. A very short time on a planetary scale. Not even as long as mammals have been dominant on Earth.
Granted that's not an immediate concern, but if that was true I'm pretty certain I would have heard about it by now. I haven't heard anything about this anywhere. I just came to this apparent conclusion from bits and pieces I've read and watched while learning about stellar masses, types, etc.
It would also seem to me that you can't ascribe our movement towards Vega our planetary orbit of the Sun nor Vega around a companion star. Vega is solitary, and is almost perfectly aligned with our North pole and we with one of it's poles.
Also, Vega is expected to survive as a main sequence star for another 500 million years, so if it's on a collision course it will be here long before it becomes a red giant.
Sources:
http://simbad.u-strasbg.fr/simbad/s...ubmit=display+selected+measurements#lab_meas"
http://en.wikipedia.org/wiki/Vega"
http://www.solstation.com/stars/vega.htm"
Granted that's not an immediate concern, but if that was true I'm pretty certain I would have heard about it by now. I haven't heard anything about this anywhere. I just came to this apparent conclusion from bits and pieces I've read and watched while learning about stellar masses, types, etc.
It would also seem to me that you can't ascribe our movement towards Vega our planetary orbit of the Sun nor Vega around a companion star. Vega is solitary, and is almost perfectly aligned with our North pole and we with one of it's poles.
Also, Vega is expected to survive as a main sequence star for another 500 million years, so if it's on a collision course it will be here long before it becomes a red giant.
Sources:
http://simbad.u-strasbg.fr/simbad/s...ubmit=display+selected+measurements#lab_meas"
http://en.wikipedia.org/wiki/Vega"
http://www.solstation.com/stars/vega.htm"
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