15 Jul 15
http://phys.org/news/2015-07-jupiter-twin-solar.html
A star less than 200 light years away, a twin of Sol, also has a Jupiter sized planet at the same distance as our Jupiter, an indication maybe the inner solar system may be similar to ours.
Most of the exo planets found have shown Jupiter sized planets a few million miles from the sun not a good sign for habitability.
So it is showing there are solar systems out there similar to ours, perhaps a minority but at least more than the one we know about🙂
15 Jul 15
Originally posted by twhiteheadYep, but it is still a good sign that we found at least one other one like us. It is also interesting that star is a near twin of ours, maybe stars with that mass are the ones most likely not to have giant planets a million miles from the parent star.
That is an outdated statistic and was mostly a result of selection bias - large planets in short orbits are the easiest to detect.
15 Jul 15
Originally posted by sonhouseI wouldn't be basing your statistics on two examples. I very much doubt that the star being a near twin of ours is a 'interesting' but rather it is the reason why it was reported on. In other words we probably already know of other systems where the sun is not almost a twin of ours. Again: selection bias.
Yep, but it is still a good sign that we found at least one other one like us. It is also interesting that star is a near twin of ours, maybe stars with that mass are the ones most likely not to have giant planets a million miles from the parent star.
16 Jul 15
Originally posted by twhiteheadOf course. There was a recent Scientific American article looking for sun like stars and the conclusion was our sun and hundreds like it were born in the same cloud and now these stars have drifted halfway round the galaxy but they are piecing the story together, G2 stars born together then separating as time goes by.
I wouldn't be basing your statistics on two examples. I very much doubt that the star being a near twin of ours is a 'interesting' but rather it is the reason why it was reported on. In other words we probably already know of other systems where the sun is not almost a twin of ours. Again: selection bias.
Which doesn't mean all G2 stars were born in that cloud, just a bunch have been found and traced out.
