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Offline Murchie85

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« on: 24/08/2010 15:01:47 »
Just read a nice article on the bbc website about star system discovered with 5 orbiting exoplanets.

http://www.bbc.co.uk/news/science-environment-11070991

Of course being a popular website I don't expect them to present a true accurate report of the current sitiutation although it did get me thinking. Apparently this is among the first stars discovered with such an abundance of orbiting 'planets'.

Would it not be the case that a lot of the stars already observed have planets and that we just have not detected them due to our current method's of detecting planets not being very effective?

Thanks

Adam


 

Offline LeeE

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« Reply #1 on: 24/08/2010 20:04:28 »
For a system that's suspected to have seven planets, including one that's only 1.4 x the mass of the Earth (but if it's really there it's orbiting its star at just 0.02 AU), have a read of:

http://www.theregister.co.uk/2010/08/24/hd10180_system/

The article contains a link to a paper on the system.
 

Offline Murchie85

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« Reply #2 on: 24/08/2010 20:30:56 »
Yea :( Unlikely any life evolving 0.2 AU from a star :(
 

Offline tommya300

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« Reply #3 on: 25/08/2010 03:48:38 »
Worlds beyond our Sun

"Closest exoplanet yet confirmed:
In 2006, the Hubble Space Telescope, in collaboration with ground-based observations, provided definitive evidence for the existence of the nearest extrasolar planet to our solar system. The Jupiter-sized world orbits the Sun-like star Epsilon Eridani, which is only 10.5 light-years away.
At the time of Hubble’s launch in 1990, astronomers had not found a single planet outside our solar system"
...more
.
 

Offline LeeE

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« Reply #4 on: 25/08/2010 12:12:18 »
Yea :( Unlikely any life evolving 0.2 AU from a star :(

Your 0.2 AU was probably just a typo, but even at 0.02 AU, life might just be possible around a very small red/brown dwarf star (HD10180 is reckoned to be about 1.4 solar masses though).

Even then, we shouldn't give up on the idea of life in what we would consider to be impossible conditions: there have been a few 'hard' science-fiction novels, based upon some very good research, that deal with life in gas giants and even on neutron stars:

http://en.wikipedia.org/wiki/The_Algebraist (gas giant life forms)
http://en.wikipedia.org/wiki/Dragon's_Egg (neutron star life forms)
 

Offline peppercorn

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« Reply #5 on: 25/08/2010 12:41:37 »
Even then, we shouldn't give up on the idea of life in what we would consider to be impossible conditions: there have been a few 'hard' science-fiction novels, based upon some very good research, that deal with life in gas giants and even on neutron stars.

Also:
http://en.wikipedia.org/wiki/Saga_of_Seven_Suns
 

Offline Murchie85

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« Reply #6 on: 25/08/2010 16:44:08 »
LeeE, peppercorn, thanks for the links. Will give me some light reading.You know i hear that a lot about their being possible chances for life on europa and titan even although the temperatures are extreme and in titan for example water is frozen solid as steel.

 I do however think even if life is possible on these planets or the 0.02 AU (thanks for the correction) that it would have to be single celled or rather simple as I just can't see the conditions suiting for complex diverse life like us and other animals on earth.
 

Offline yor_on

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« Reply #7 on: 09/09/2010 07:42:13 »
Light Reading?
Blasphemy Sir, this is hardcore science.

Next you will tell me that Dune is just a fantasy?
Really..
 

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« Reply #7 on: 09/09/2010 07:42:13 »

 

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