Declination in astronomy is comparable to geographic latitude, projected onto the celestial sphere. Points north of the celestial equator have positive declinations, while those south have negative declinations. In Astrophotography, it is measured in the degrees, minutes, and seconds of sexagesimal measure, with 90 degrees equivalent to a quarter circle. Declinations with magnitudes greater than 90 do not occur, because the poles are the northernmost and southernmost points of the celestial sphere.
A small telescope, usually mounted directly on a main telescope, that is connected to a camera and a computer. A guidescope is used to tell the mount how to adjust for drifing stars, which helps the mount stay on target and thus be able to take longer exposures.
Pertaining to the Moon
SkyShed Personal Observation Dome
Right ascension is the celestial equivalent of terrestrial longitude. Both right ascension and longitude measure an angle from a primary direction (a zero point) on an equator. Right ascension is measured from the Sun at the March equinox i.e. the First Point of Aries, which is the place on the celestial sphere where the Sun crosses the celestial equator from south to north at the March equinox and is currently located in the constellation Pisces. Right ascension is measured continuously in a full circle from that alignment of Earth and Sun in space, that equinox, the measurement increasing towards the east. In Astrophotography, it is measured in hours, with 24 hours making a complete circle around the Earth.
A device, program, or sensor that tells automation software like NINA that it is "safe" or "unsafe" to perform an action. Typically, it monitors if the sky is visible (roof open), cloud cover, rainfall, and other things, but it can be as complicated or simple as you need it to be. There are virtual safety monitors that create a safe/nosafe condition based on programmable inputs as well such as weather conditions and other things that are not from physical sensors.
Pertaining to the Sun