Absolute magnitude is the apparent magnitude of a celestial body located at 10 parsecs away from earth

Escape velocity is the minimum speed to exit the gravitational influence of a massive body

Galactic year is the time taken by an astronomical body to revolve around the galaxy once

Apogee & Perigee are the farthest and closest point from earth

Exoplanet are the planets outside our solar system

Magnetosphere is the region where plasma such as solar wind interacts with the magnetic field of that body

Meteoroid is a small rock or boulder that has entered a planet’s or moon’s atmosphere

Comet is a small, icy body that displays extended features (tail) when it approaches the sun

Meteorite is a piece of meteor which manage to successfully survive its passage through planet’s or Moon’s atmosphere and touch down its surface

Luminosity is the total amount of energy emitted by a star, galaxy or any other astronomical object

Red shift is the term used when an object is moving farther away from an observer and there is a increase in wavelength and decrease in frequency of photons emitted from the source

Interstellar Medium is termed for the matter and radiation that exists between stars in a galaxy

Oumuamua can be considered as extrasolar object but proxima centauri can’t be considered as a extrasolar object