Re: conplaneteering

On Saturday 12 February 2005 16:07 +0100,
Jörg Rhiemeier wrote:

 > Hallo!
 >
 > On Fri, 11 Feb 2005 16:02:29 -0500,
 >
 > "Mark J. Reed" <markjreed@MAIL.COM <mailto:markjreed@...>> wrote:
 > > I'm trying to calculate the orbital period of an
 > > Earth-sized planet at 15 AUs out from a star that's
 > > about 7.5 times the mass of the Sun.
 >
 > What are you going to do with that planet?  If you want
 > an Earthlike planet with nitrogen-oxygen atmosphere and
 > lots of life on it, forget it!  A star with about 7.5
 > times the mass of the Sun has a very short lifespan (only
 > a few million years), which means that the planet doesn't
 > have enough time to evolve an advanced biosphere before
 > the star goes bust.  Your star would go supernova before
 > the planet has formed a solid crust.
 >
 > And according to current theories, such huge stars don't
 > have planets at all.  High-mass stars rotate rapidly
 > (with periods of a few *hours* as compared to the
 > 20-something *days* of the Sun) and have angular momenta
 > comparable with that of the entire solar system (where
 > the *mass* is mostly in the Sun, but the *angular
 > momentum* mostly in the planets), which indicates that
 > they don't have planets to transfer their angular
 > momentum to.

Sorry for hijacking, but ...

While reading this thread, I wondered if it wouldn't be
better to put my planet into the orbit of κ Virgo[1] to
make an end to unscientific guesswork. However, an
astronomy program that came with a version of Knoppix Linux
said κ Virgo was 85.6x our sun in size, was in class K3III
(cf. G2V), had a surface temperature of 4730K (cf. 5860K),
had a radius of 18.38x our sun and a rotation period of
53,000 days (cf. 25,400 days). Would it be better suitable
for life than Mark's star?

Thanks,
Carsten

[1] Kappa because my first name begins with [k], Virgo
because I was born on August 26. It's the same method Mark
Reed or Ray Brown or so used for placing their conworld.

--
Edatamanon le matahanarà benenoea ena 15-A7-58-10-2-1A-22
ena Curan Tertanyan.
» http://www.beckerscarsten.de/?conlang=ayeri

Replies