"Starlord" wrote in message
...
Are you talking about a Jupiter type planet or a rockry planet? Becuae the
rockry planet would never reach the point where it would become a star.

As far as a Jupiter type planet to reach even the level where it would
become a dim short lived R.D. star it would be somewhere around 25 jupiter
mass. To become a star like our own, it would never be a planet at all, it
would be a cloud of gas that would be compressed under it's own g force to
the point where the fushion reaction would start and thus a star is born.

yeah i may be getting confused here with the mass limit for a black hole,
but i just seemed to remember there was a name for a hypothetical mass limit
beyond which a star would be formed.



--
The Lone Sidewalk Astronomer of Rosamond

Telescope Buyers FAQ
http://home.inreach.com/starlord
Sidewalk Astronomy
www.sidewalkastronomy.info
The Church of Eternity
http://home.inreach.com/starlord/church/Eternity.html


"Jeremy Watts" wrote in message
news
hi, is there an actual name for the mass limit that a planet must
achieve
beyond which it will collapse and become a star?

i studied astrophysics many years ago and seemed to remember there was,
or
am I becoming confused with the chandraseka (spelling may be well off
there)
limit for a black hole?

thanks