We measure the sky and objects in degrees of arc, which can be further divided into arcseconds and arcminutes.

When I downloaded the recent 1-Click Observation narrowband data for the Ant Nebula, I did not know that this object’s designation was Menzel 3.

No one likes to be photobombed, especially astrophotographers, by the ever-increasing number of satellites. Once a satellite leaves its trails on your frame, it’s near impossible to remove it after stacking.

Like the Messier Catalog, The Caldwell Catalogue is an astronomical index of 109 star clusters, nebulae, and galaxies for observation by amateur astronomers.

The introduction of unnatural-looking purple stars to your image, is a common problem with processing narrowband images in the well-known Hubble colour palette (or “SHO” image). 

What do all these terms mean?