planets outside the solar system

[ellion]

are there known planets outside the solar system?

i am always hearing about the usual 7 planets sometimes 9 or 10. but is there planets outside our solar system?

[snake river rufus]

Yes. I think that the last count is around 120 observed through indirect evidence and 2 by visual means. It as not believed that any are terrestrial. I have not picked up an astronomy magazine for a while so this may be out of date.

[may_wentee]

Yes. I think that the last count is around 120 observed through indirect evidence and 2 by visual means. It as not believed that any are terrestrial. I have not picked up an astronomy magazine for a while so this may be out of date.

Just what exactly is considered 'outside of our solar system'? Are these so-called 122 planets regardless of their distance and makeup, rotating about our sun or are they not? :D

[2inquisitive]

No, the extrasolar planets (sometimes called exoplanets) are orbiting stars other than our sun. Here is a cut & paste:

"Astronomers have detected the smallest extrasolar planet yet: a world about seven and a half times as massive as Earth, orbiting a star much like ours.
All of the 150 or so exoplanets found orbiting normal stars are larger than Uranus, itself 15 times Earth's mass.

The new find may be the first rocky world found around a star like our Sun.

The newly discovered "super-Earth" orbits the star Gliese 876, located 15 light-years away in the direction of the constellation Aquarius."
http://news.bbc.co.uk/2/hi/science/nature/4089534.stm

[may_wentee]

No, the extrasolar planets (sometimes called exoplanets) are orbiting stars other than our sun. Here is a cut & paste:

"Astronomers have detected the smallest extrasolar planet yet: a world about seven and a half times as massive as Earth, orbiting a star much like ours.
All of the 150 or so exoplanets found orbiting normal stars are larger than Uranus, itself 15 times Earth's mass.

The new find may be the first rocky world found around a star like our Sun.

The newly discovered "super-Earth" orbits the star Gliese 876, located 15 light-years away in the direction of the constellation Aquarius."
http://news.bbc.co.uk/2/hi/science/nature/4089534.stm

Should we get ready and book a flight to Gliese 876 for a new 'rocky' world vacation? 15 light years away? Just a stone's throw away.....Right? :D

[snake river rufus]

Just what exactly is considered 'outside of our solar system'? Are these so-called 122 planets regardless of their distance and makeup, rotating about our sun or are they not? :D
No they are not.

[snake river rufus]

150 new exoplanets, I need to subscribe to 'Astronomy" again

[2inquisitive]

"Just a stone's throw away.....Right?"
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It's according to what scale you are using....your backyard or our galaxy.

[may_wentee]

"Just a stone's throw away.....Right?"
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It's according to what scale you are using....your backyard or our galaxy.

O.K. When should we start the migration? By the time the first space ships arrive from Earth, the rocky surface should have smoothed out a little on the so-called super-earth that orbits Gliese 876. Call your NASA travel agency and book a ticket in advance. :D

[ellion]

thanks guys

[eburacum45]

I wouldn't go to Gliese 876 d if I were looking for an Earth-like environment; it probably has a gravity twice that of the Earth's, a thick atmosphere and a considerable greenhouse effect, making it a bit like a damp version of Venus.

[Ophiolite]

150 new exoplanets, I need to subscribe to 'Astronomy" again
No. You need to bookmark the following site:
http://vo.obspm.fr/exoplanetes/encyclo/encycl.html

Within that you fill find, amongst many wonders, the following
Global statistics :
147 planetary systems
170 planets
17 multiple planet systems

The site also deals with the various detection techniques and has many interesting links.

[may_wentee]

I wouldn't go to Gliese 876 d if I were looking for an Earth-like environment; it probably has a gravity twice that of the Earth's, a thick atmosphere and a considerable greenhouse effect, making it a bit like a damp version of Venus.

Sounds like Calcutta India in the middle of summer on a rainy day........ :D

[snake river rufus]

No. You need to bookmark the following site:
http://vo.obspm.fr/exoplanetes/encyclo/encycl.html

Within that you fill find, amongst many wonders, the following
Global statistics :
147 planetary systems
170 planets
17 multiple planet systems

The site also deals with the various detection techniques and has many interesting links.
Thanks for the link, it's an interesting site.

[qwerty mob]

The Encyclopedia has really grown. I lost track about 5 years ago... Thanks, Ophiolite.

[NACHMAN]

are there known planets outside the solar system?

i am always hearing about the usual 7 planets sometimes 9 or 10. but is there planets outside our solar system?
YEAH THER ARE.SCIENTIST ARE ABLE TO IDENTIFY 9 PLANETS(INCLUDING EARTH) OUTSIDE THE SOLAR SYSTEM.BUT THEY ARE SURE THAT MANY OTHER PLANETS EXIST WHICH HAVEN'T YET BEEN DISCOVERED.
ANYOTHER QUESTION