Software & Processing Notes
CCDSoft, CCDStack, Photoshop CS w/ the Fits Liberator plugin,
Noel Carboni's actions
and Russell Croman's GradientXTerminator.
PixFix32 (pre-beta) to
repair hot/cold pixels and column defects.
CCDStack to calibrate, register,
normalize, data reject, combine sub exposures & color combine for
PhotoShop CS3 for
and LLRGB combine
North is to the
was discovered by Giovanni Batista Hodierna before 1654 and
independently found by Le Gentil in 1749.
The cluster spans roughly 25 light-years
and lies about 4000 light-years away toward the constellation of
Auriga. M38 is about 220 million years old, still young enough to
have many young bright blue stars. Clusters, like this, are loosely
bound by gravity. As they age, the clusters spread out and the
member stars slowly escape.