Terminology
The distance light travels in a year
What is a Light year?
The third closest planet to the sun and the only planet with life.
What is the Earth?
Out home star and the closest star to the earth.
What is the sun?
The closest natural satalite to earth.
What is the Moon?
The distance between the Earth and the sun
What is an AU?
The star system is closest to the earth outside the solarsystem.
A unit of temprature. Commonly used to denote the temprature of stars in scientific comunities.
What is a Kelvin?
The brightest and most luminus star in the night sky.
What is Sirius A?
The "Radius" of a black hole, where not even light can escape.
What is a Schwarzschild radius?
The fastest spacecraft ever made traveling at about 192 km/s
What is the Parker solar probe.
The planet (not dwarfplanet) with the most elliptical orbit.
What is mercury?
The distance at which the angle between the Earth and the sun is one arcsecond
What is a Parsec?
The most distant dwarfplanet with a furthest point of about 146 000 000 000 km.
What is Sedna?