PDA

View Full Version : Systems with possible Earth Like planets...



Drakheim
2005-Mar-09, 06:07 PM
I was browsing Celestia’s list of stars that have planetary companions, and ran across a couple that ‘might’ have the ability to have an Earth like planet. My question then, is how likely would it be that an Earth-like planet would form in a system where a Jupiter/Saturn sized gas giant is located within the inner system?

The one in particular I am referring to has a Saturn sized gas giant about 4 AU from the star.

A.DIM
2005-Mar-09, 06:33 PM
I was browsing Celestia’s list of stars that have planetary companions, and ran across a couple that ‘might’ have the ability to have an Earth like planet. My question then, is how likely would it be that an Earth-like planet would form in a system where a Jupiter/Saturn sized gas giant is located within the inner system?

The one in particular I am referring to has a Saturn sized gas giant about 4 AU from the star.

From what I've read, I don't think an earthlike planet could form in the "green belt" if there exists such a larger body nearby. Then again, some suppose that these large bodies so close are slowly spiraling into their parent star, and perhaps afterwards could still form earthlike planets.

I find both the
Study Doubles Number of Potential Earthlike Planets (http://www.space.com/scienceastronomy/astronomy/planet_formation_010810-1.html), and the more recent Scientists Discover First of a New Class of Extrasolar Planets (http://www.nasa.gov/home/hqnews/2004/aug/HQ_04281_extra_planets.html) to be relevant.
Personally, I think we're on the very brink of discovering en masse earthlike planets.

Kemal
2005-Mar-09, 08:33 PM
Do we even have the ability to detect Earth-sized planets at these distances?

Van Rijn
2005-Mar-09, 09:58 PM
Do we even have the ability to detect Earth-sized planets at these distances?

Currently only in EXTREME special cases - there were some found around Neutron stars:

http://www.space.com/scienceastronomy/aas_earthsize_020329.html

The Kepler mission should let us detect them around more sunlike stars, but only if they pass between us and the star:

http://www.kepler.arc.nasa.gov/

We'll need bigger telescopes to actually image them:

http://www.terrestrial-planet-finder.com/

Drakheim
2005-Mar-09, 10:08 PM
I thought that neutron stars were only formed after a supernova :-s.

Van Rijn
2005-Mar-09, 10:54 PM
Yes, but there can still be earth sized planets orbiting them. That doesn't mean they started as earth sized planets ...

Drakheim
2005-Mar-09, 10:59 PM
Yes, but there can still be earth sized planets orbiting them. That doesn't mean they started as earth sized planets ...

I'm just suprised that they would have survived the explosion. Even if they were greater than Jovian sized masses.

the_shaggy_one
2005-Mar-09, 11:18 PM
Drakheim:

We only know of two pulsars with planets right now, but that's because they're a special class of pulsar that makes it easier for us. In one case, they probably formed from debris after the supernova. In the other, the planet was probably captured.

A.DIM
2005-Mar-10, 12:29 AM
Interestingly...

Last month there were A Dozen New Planets Found (http://www.astrobio.net/news/modules.php?op=modload&name=News&file=article&sid= 1447&mode=thread&order=0&thold=0); One of which is a "pulsar planet."

Manchurian Taikonaut
2005-Mar-10, 01:35 AM
also talked about in the thread ' Where is the Sol-like planet system ? '

http://www.badastronomy.com/phpBB/viewtopic.php?t=15342&highlight=