Earth-Like Extrasolar Planet?

Henry Spencer wrote:

In article ,
Pat Flannery wrote:


The question I'd like to know the answer to is exactly how long lived is
a planet in that low of a stellar orbit?
I mean it must be almost skimming the surface of the star...



If memory serves, it's about ten stellar radii out. Stars are smaller
than you might think. :-)



I was surprised to see just how low the predicted surface temperature
was, I would have expected something near molten, but they are
speculating that it's cooler than Venus.
Still, can you imagine how big that sun is in the planet's sky? That
really must be some view. And being that its sun is a red dwarf, you
might actually be able to see details of storms on its surface.
Assuming that the planet is tidally locked so that one side is
perpetually pointed toward its sun, there could be some very interesting
temperature ranges near the terminator of the illuminated hemisphere and
on the dark side. There sure shouldn't be any lack of volcanic activity
with tidal forces from that close of an orbit around its sun acting upon
it (I note that they showed volcanic activity on its dark hemisphere in
the painting of it) so it should have a pretty substantial atmosphere also.

Pat

Henry Spencer ) wrote:
: In article ,
: Pat Flannery wrote:
: The question I'd like to know the answer to is exactly how long lived is
: a planet in that low of a stellar orbit?
: I mean it must be almost skimming the surface of the star...

: If memory serves, it's about ten stellar radii out. Stars are smaller
: than you might think. :-)

Okay, if the sun is 860,000 in diameter, then the same planet in our solar system would be 4.3 million
miles or about 8 times closer than Mercury at ~36 million miles from the sun. Still that's damn close to
the star!

The question is, does the planet get hit with solar flares and if so what do they do to the planet?

Eric

: --
: "Think outside the box -- the box isn't our friend." | Henry Spencer
: -- George Herbert |

Henry Spencer wrote:
In article ,
Pat Flannery wrote:
The question I'd like to know the answer to is exactly how long lived is
a planet in that low of a stellar orbit?
I mean it must be almost skimming the surface of the star...

If memory serves, it's about ten stellar radii out. Stars are smaller
than you might think. :-)

at least starts of that type and stage. It would be interesting to see what
the situation will be in some hundereds of millions of of years then the star
is no longer that slim...

--
Sander

+++ Out of cheese error +++

Andrew Gray wrote:

Coo. 0.02 AU and a half-dozen earth masses, but it's certainly a
start... the envelope for detection is expanding all the time.




This says it's 7.5 Earth masses, and is in a two day long orbit:
http://www.universetoday.com/am/publ...t.html?1362005
This sounds like something that's going to decay into its sun in fairly
short order by astronomical standards.

On Mon, 13 Jun 2005 19:18:35 GMT, h (Rand
Simberg) wrote:

Press conference from the NSF at 1 PM

http://nsf.gov/news/newsmedia/planetdiscovery.jsp


The page cannot be found
The page you are looking for might have been removed, had its name
changed, or is temporarily unavailable.

--------------------------------------------------------------------------------

Please try the following:

If you typed the page address in the Address bar, make sure that it is
spelled correctly.

Open the nsf.gov home page, and then look for links to the information
you want.
Click the Back button to try another link.
Click Search to look for information on the Internet.



HTTP 400 - Bad Request
Internet Explorer



Christopher
++++++++++++
"The best way to keep one's word
is never to give it."

Napoleon Bonaparte

On Mon, 13 Jun 2005 19:08:43 GMT, in a place far, far away,
Christopher made the phosphor on my
monitor glow in such a way as to indicate that:

On Mon, 13 Jun 2005 19:18:35 GMT, h (Rand
Simberg) wrote:

Press conference from the NSF at 1 PM

http://nsf.gov/news/newsmedia/planetdiscovery.jsp


The page cannot be found

Still works for me.

Rand Simberg ) wrote:
: On Mon, 13 Jun 2005 19:08:43 GMT, in a place far, far away,
: Christopher made the phosphor on my
: monitor glow in such a way as to indicate that:

: On Mon, 13 Jun 2005 19:18:35 GMT, h (Rand
: Simberg) wrote:
:
: Press conference from the NSF at 1 PM
:
: http://nsf.gov/news/newsmedia/planetdiscovery.jsp
:
:
: The page cannot be found

: Still works for me.

You may have to refresh a couple of times. It does come up.

On Mon, 13 Jun 2005 22:16:52 GMT, h (Rand
Simberg) wrote:

On Mon, 13 Jun 2005 19:08:43 GMT, in a place far, far away,
Christopher made the phosphor on my
monitor glow in such a way as to indicate that:

On Mon, 13 Jun 2005 19:18:35 GMT, h (Rand
Simberg) wrote:

Press conference from the NSF at 1 PM

http://nsf.gov/news/newsmedia/planetdiscovery.jsp


The page cannot be found

Still works for me.

Just tried it again. OK now.



Christopher
++++++++++++
"The best way to keep one's word
is never to give it."

Napoleon Bonaparte

Where is Frank Herbert....

....when we really need him?

Jim Oberg wrote:

Where is Frank Herbert....

...when we really need him?



Maybe we can get a ghola made of him.

Pat