Galileo’s drawing of
the Pleiades from
the Sidereal
Messenger (left) and
an image from a
modern replica of
Galileo’s telescope
(below).
Only the outlined
stars in Galileo’s
drawing are visible
with the naked eye.
QuickTime™ and a
decompressor
are needed to see this picture.
The Planck
function for
temperatures
from 3500 5500 K
(graphic
stolen from
wikipedia)
Solar spectrum,
shown as
through a prism
(top) and in a
plot of intensity
vs. wavelength
(side) (images
taken from
wikipedia)
Spectra for O - G stars (left) and G - M stars (right)
QuickTime™ and a
decompressor
are needed to see this picture.
Element abundances in the Solar system (data
from Lodders 2003)