On the colonization of space

On Mon, 15 Nov 2004 03:38:39 -0000, Richard wrote:
(...)
> I assume that a spectrum of the sunlight reflected from the surface.
> Then assume that the surface is typical of what's inside. Probably
> fair accurate.
(...)

There are also meteors that fell on Earth that are (apparently - again
spectroscopic and visual analysis play a role) fragments of
chondrites, and their internal composition was analysed directly.