Talk:Optical System for Imaging and low Resolution Integrated Spectroscopy

I've just added the other astronomical instrument named OSIRIS. Should these be split out into two separate pages instead? Mperrin 07:51, 8 March 2006 (UTC)
 * Even more right now than it was a year ago -- we're counting three cameras + one spacecraft at the moment. --84.188.221.11 15:51, 1 April 2007 (UTC)

Sky subtraction ?
Explain "sky subtraction" please.

Tank you.

Jean-François Clet (talk) 16:56, 7 February 2020 (UTC)