Glossary

Alt-Az: Short for Altitude-Azimuth. Alt-Az is the frame of reference when a telescope mount is oriented level to the horizon. Azimuth describes the movement in degrees when moving the scope around the horizon. Altitude is the tilt upward in degrees to a target's location above the horizon. See Equatorial.

Bortle Scale: The Bortle dark-sky scale (usually referred to as simply the Bortle scale) is a nine-level numeric scale that measures the night sky's brightness of a particular location. (Bortle scale)

Dark flats: A method of subtracting noise out of stacked images. A sensor contributes bad data from noisy and dead cells, from amplifier glow related to circuitry, and other regular causes. By taking "dark flats," an astrophotography program makes a set of exposures with the lens covered; these represent an average of all the non-image noise present in each photo. After stacking, the flats are "applied" which causes their noise to be subtracted from the image.

EAA (Electronically Assisted Astronomy):

Equatorial: World globes are typically mounted in stands that support the globe in its orbital inclination of 23°, and the axis of the globe represents true north. When a telescope mount is aligned to rotate around this axis, the reference system is called Equatorial (the mount rotates around the equator, not the horizon). See Alt-Az.

GAN charger:  a type of charger that uses Gallium Nitride (GaN) instead of the traditional silicon in its internal circuitry. A GAN charger has high energy density for its size, making it more portable.

OSC (One Shot Color) camera:

Plate solving: Using an astronomy camera (usually a guide camera) to navigate to a celestial object by taking photos and comparing stars with a star map of the object's location.

Slewing: The process of rotating a telescope to observe a different region of the sky.

Stacking: In photography, stacking involves registering a series of photographs to build up the image density of faint features. "Live Stacking" is when software continually updates your visual impression of a target. Photo Stacking is when software accumulates all the photos in your session and creates a single composite photo at the end. In the EduSnap app, a photo capture involves progressively registering and redisplay of a series of exposures "stacked" into one final image. In effect, we get both live and photo experiences. Don't forget to download it to your phone's picture gallery or you'll need to start over.

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In the comments, please suggest other terms that seem odd or confusing.