Am I missing something?

Space/Science » in reply to An exoplanet with a 1 year long orbit around a red giant!

Fox — 8/3/2007 5:45:42 PM (archived)

I'm at work, and my astronomy textbook is at home, so help me out here, please ...

I recall that one of Kepler's Laws (2nd?) relates orbital velocity, thus orbital period, to distance from the barycenter. Thus, a year the length of Earth's implies (to me) a radial distance equivalent to Earth's.

Would the exoplanet in question be orbiting inside the photosphere of the red giant?

The whole thread (17 posts)

An exoplanet with a 1 year long orbit around a red giant! - Raoul - 8/2/2007 8:01:13 PM
- Am I missing something? - Fox - 8/3/2007 5:45:42 PM
  - Yep. - Hank - 8/3/2007 6:49:16 PM
    - "The primary star is 10 solar masses " is a typo - Hank - 8/3/2007 6:55:19 PM
      - re: "The primary star is 10 solar masses " is a typo. Got that and your post does stand. (n/t) - Marcia - 8/3/2007 7:11:54 PM
  - Mass of the objects - phil - 8/3/2007 6:28:51 PM
    - re: Mass of the objects - pwokenyaw - 8/3/2007 6:33:29 PM
- This might be an interesting place to visit. - Hank - 8/3/2007 1:33:36 PM
  - re: This might be an interesting place to visit. - Marcia - 8/3/2007 6:08:23 PM
- re: An exoplanet with a 1 year long orbit around a red giant! - Marcia - 8/3/2007 3:54:02 AM
  - Why the Earthlike orbit isn't really like Earth's - New Age Vapors - 8/3/2007 7:56:22 PM
    - re: Why the Earthlike orbit isn't really like Earth's. Yes., - Marcia - 8/3/2007 8:28:37 PM
    - The planet's orbit might be highly elliptical, too. - Hank - 8/3/2007 8:20:08 PM
      - re: The planet's orbit might be highly elliptical, too. - also a possibility. - Marcia - 8/3/2007 8:30:17 PM
        
        re: The planet's orbit might be highly elliptical, too. - also a possibility. - Hank - 8/4/2007 2:25:00 AM
        
        re: The planet's orbit might be highly elliptical, too. - also a possibility. - Marcia - 8/4/2007 3:19:40 AM
        
        Largest Transiting Extrasolar Planet Found Around A Distant Star - New Age Vapors - 8/6/2007 4:22:41 PM

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