Space/Science » in reply to I've always thought of seasonality as being critical to drive evolution.

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• Earth-like planet, with water, around red dwarf Gliese 581? - REB - 4/24/2007 7:31:46 PM
  • Are we *sure* it'd have volatiles? - dtb - 4/26/2007 1:13:42 PM
    • No such thing as sure - nick hoffman - 4/26/2007 11:37:36 PM
  • It's actually has a diameter 50% larger than our world. - Jacob Samorodin - 4/25/2007 11:16:43 PM
    • re: Would the absense of a magnetic field be as catastrophic to the atmosphere of a red-dwarf planetary system? - The Artist formerly known as Scott Evil - 4/26/2007 3:15:47 AM
      • Solar wind - nick hoffman - 4/26/2007 9:53:47 AM
        • re: Solar wind - Joe P. - 4/26/2007 4:49:47 PM
          • "day" and "year" - nick hoffman - 4/26/2007 11:47:47 PM
        • very interesting... Now we need a imaging telescope that can tell us more! - The Artist formerly known as Scott Evil - 4/26/2007 1:40:37 PM
  • re: The discoverer - Raoul - 4/25/2007 6:24:36 AM
  • Two interesting facts... - TB - 4/25/2007 6:12:00 AM
  • Couple of questions: - TB - 4/25/2007 5:46:25 AM
    • re: Couple of questions: - REB - 4/25/2007 1:37:28 PM
      • Splitting Hairs - 3 days per 2 years - M.A.E. - 4/25/2007 9:06:37 PM
        • Who needs an atmosphere? - nick hoffman - 4/25/2007 11:10:46 PM
          • Good point but - M.A.E. - 4/26/2007 2:31:25 AM
            • re: Good point but - Excellent points by both of you (MAE & Nick). - Marcia - 4/26/2007 8:44:42 PM
      • re: Couple of questions: - Raoul - 4/25/2007 2:15:50 PM
        • Did some digging. maybe this will help. - REB - 4/25/2007 2:30:44 PM
          • re: Did some digging. maybe this will help. Thanks, REB. - Marcia - 4/26/2007 2:03:16 PM
            • Speaking of a moon- could part of this planet's calculated mass be a moon? - REB - 4/26/2007 2:34:40 PM
              • Not 4 Earth masses- 5 Earth masses. - REB - 4/26/2007 2:57:26 PM
                • I would love to see a true binary-planet... Where two relatively equal planets are sharing the same center of gravity. - The Artist formerly known as Scott Evil - 4/26/2007 4:25:03 PM
                  • I wonder what it would have been like to have Venus as our moon. - REB - 4/26/2007 9:57:49 PM
              • Very Good point! - The Artist formerly known as Scott Evil - 4/26/2007 2:50:57 PM
          • Good detective work. You were correct! - ER - 4/25/2007 3:13:11 PM
        • re: Couple of questions: - REB - 4/25/2007 2:22:58 PM
    • re: Couple of questions: - ER - 4/25/2007 11:19:37 AM
      • re: The flares could themselves result in "seasons" on such a planet. - The Artist formerly known as Scott Evil - 4/25/2007 2:44:07 PM
        • Interesting... - nick hoffman - 4/25/2007 11:07:18 PM
          • I've always thought of seasonality as being critical to drive evolution. - The Artist formerly known as Scott Evil - 4/26/2007 3:26:56 AM
            • re: I've always thought of seasonality as being critical to drive evolution. - Joe P. - 4/26/2007 4:55:37 PM
            • Interesting idea, I've started a new thread on it, I hope you don't mind. (n/t) - ER - 4/26/2007 2:36:15 PM
              • Not at all. - The Artist formerly known as Scott Evil - 4/26/2007 2:53:31 PM
            • Well Evolution Requires Either Genetic Drift Or Selective Pressure - M.A.E. - 4/26/2007 2:07:13 PM
              • Getting wiped out can be good for evolution. - The Artist formerly known as Scott Evil - 4/26/2007 4:40:25 PM
        • Don’t Red Dwarfs flair when they are young and calm down as they get older? - REB - 4/25/2007 2:48:57 PM
          • Flares last minutes, maybe an hour or so (n/t) - phil - 4/25/2007 2:52:33 PM
            • I mean a Red Dwarf’s Flare frequency goes decreases as the star ages. - REB - 4/25/2007 2:55:23 PM
              • rI'm specificly referring to red dwarf flare times (n/t) - phil - 4/25/2007 2:59:20 PM
    • Found a few answers - TB - 4/25/2007 6:13:19 AM
      • Also, what about moons, double planets - Sawyer - 4/25/2007 1:10:56 PM
        • Massive solar tides - ER - 4/25/2007 1:37:21 PM
          • Tides - phil - 4/25/2007 2:58:39 PM
          • Not sure about that... - TB - 4/25/2007 2:34:07 PM
            • I think it would depend on the specific make-up of the planet and it's atmosphere (if any) - The Artist formerly known as Scott Evil - 4/25/2007 2:46:52 PM
            • You're right about the tides, senior moment on my part. - ER - 4/25/2007 2:44:57 PM
              • Don't be too hard on yourself - TB - 4/25/2007 4:25:37 PM
              • re: You're right about the tides, senior moment on my part. - REB - 4/25/2007 2:57:21 PM
          • re: Massive solar tides - REB - 4/25/2007 1:51:15 PM
            • re: Massive solar tides - ER - 4/25/2007 3:09:29 PM
              • Mercury - nick hoffman - 4/25/2007 10:50:38 PM
  • Well, that's not fair... - TB - 4/25/2007 5:44:30 AM
  • Data on this Star (from 2nd Gleise Catalog) - ER - 4/25/2007 12:03:02 AM
  • Wow! - Peter Bruener - 4/24/2007 9:28:05 PM
    • re: Wow! - Raoul - 4/24/2007 9:41:52 PM
    • I got the size wrong. This planet is 50% larger than the Earth. - REB - 4/24/2007 9:38:30 PM
      • 2.2Gs at 5 Earth masses and 1.5 Earth radii - phil - 4/24/2007 9:50:09 PM
        • Thanks Phil - Peter Bruener - 4/25/2007 5:03:02 AM
          • AP says 1.6G; I don't get it (n/t) - phil - 4/25/2007 4:01:24 PM
            • Either way it would be a great place to train athletes (n/t) - FrankC - 4/26/2007 9:43:21 PM
            • That seems high. Jupiter is something like 2.3-2.4 with over 300 times the mass of Earth. (n/t) - REB - 4/25/2007 4:17:52 PM
              • Huge Difference In Density - M.A.E. - 4/25/2007 9:27:29 PM
                • How do they know the radius? - ER - 4/25/2007 10:30:48 PM
                  • They Don't - M.A.E. - 4/26/2007 2:17:47 AM
                  • Radius - depends on density which depends on compositionj which depends on.... - n - 4/25/2007 11:24:02 PM
                    • A relevant paper online... - Adam - 4/27/2007 2:04:02 PM
              • re: That seems high. Jupiter is something like 2.3-2.4 with over 300 times the mass of Earth. - ER - 4/25/2007 4:59:18 PM
  • re: ESO discovery ! - Raoul - 4/24/2007 8:50:06 PM
    • D'oh! 50% larger than the Earth, not smaller. - REB - 4/24/2007 8:57:43 PM