On 30 Aug 2007 15:58:54 GMT, Margo Schulter
wrote:

Thus in 1612, Simon Marius viewed the Great Nebula in Andromeda
(now known as the Andromeda Galaxy, or M31, or NGC 224) with an
early telescope and soon published a description, saying that
its luminosity had a quality like light viewed through transparent
horn. (An interesting image -- I wonder what kind of horn.)

Cow's horn or hoof. Horn cut thin and polished was used as lamp
shades to diffuse light.

Bud

--
The night is just the shadow of the Earth.