About 200 extra-solar planets have been discovered since 1995. Among these planetary systems is there any one similar like ours solar system? Which are the most similar then? Thank you.
2006-07-26 00:50:17 · 3 answers · asked by donald duck 1 in Science & Mathematics ➔ Astronomy & Space
You are probably looking for the one that had a Jupiter mass like planet and several others in low eccentricity orbits at about the distance of Jupiter.
Here is a link to an ES catalogue that has been faithfully kept complete and up to date for about 10 years.
http://vo.obspm.fr/exoplanetes/encyclo/catalog.php
I think you are thinking of HD 69830 (http://vo.obspm.fr/exoplanetes/encyclo/catalog.php)
2006-07-26 08:53:40 · answer #1 · answered by Mr. Quark 5 · 0⤊ 0⤋
About a extra-solar system, we really can't say. Cause we still not have so good intruments to see Earth planets like. Specially at great distances...
But I can say what star is the mosst like our Sun. That is 18 Scorpii, in Scorpius, at 45.7 light years. It's age is 4.2 billion years, has the same rotation and almost identical sunspots.
There are planets like our neighbours. Like our giants. But was never discovered an Earth-like planet. The smallest planet known has a mass, I think, about 5 Earths.
2006-07-26 00:57:06 · answer #2 · answered by Ella K 1 · 0⤊ 0⤋
Astronomers haven't been able to examine any of the extra-solar systems closely enough to actually define how closely any of them may mirror our own system. Remember, many of the extra-solar planets that have been discovered haven't actually been seen, just the effects of their interaction with their central star.
The one planet that could be somewhat Earthlike orbits a star known as Gliese 876, about 15 light years distant. This website for more info about it ==> http://www.berkeley.edu/news/media/releases/2005/06/13_planet.shtml
2006-07-26 01:01:16 · answer #3 · answered by Chug-a-Lug 7 · 0⤊ 0⤋