When you’re starting out in astrophotography, the myriad technical terms can be daunting. Gain? Offset? Flat darks — or is it dark flats? Let’s clear up some common areas of confusion. We’ll start ...

In 1781, French astronomer Charles Messier published a catalog of 103 objects in the heavens. He was primarily interested in comets, but kept finding fuzzy smudges that did not move against the ...

https://siris-libraries.si.edu/ipac20/ipac.jsp?&profile=liball&source=~!silibraries&uri=full=3100001~!777812~!0#focus ...