Since you've not provided any clues... It could be - ight year, parsec or astronomical unit
Distance to nearby stars can be determined using the method of trigonometric parallax, which involves measuring the apparent shift in position of a star relative to more distant stars as the Earth orbits the Sun. This shift allows astronomers to calculate the distance to the star based on the angle subtended by the Earth's orbit.
The average distance of a planet to the sun is the Semi-major axis. The furthest it gets is the Aphelion and the closest it gets is its Perihelion. The Sun to Earth Distance is also known as one Astronomical Unit (AU).
A light-year is a unit of distance, not a unit of time.
The nearest distance is called the perihelion and the furthest distance is called the aphelion (there is about 5 million km difference). The mean distance is called one astronomical unit.
The average distance from the Sun to the Earth is one "astronomical unit" or "AU".
A stellar unit refers to a unit of distance used in astronomy to measure the distance between stars. It is typically equivalent to the mean distance between stars within a galaxy, which can vary depending on the galaxy being observed.
Light year is used to measure the stellar distances whereas miles and km is used to measure distance on Earth.
Since it is so close you would use stellar parallax to resolve the distance to proxima centauri.
Stellar distances are measured in light-years, which is the average distance between the Earth and the Sun.
A light year
metre
The C.G.S unit of distance is the centimeter (cm).
The most common is the light year, which is the distance that a beam of light will travel in one year, and is approximately 10 trillion kilometres (or about 6 trillion miles).Another unit of inter-stellar measurement is the parsec. One parsec is equal to about 3.26 light years (31 trillion kilometres, or 19 trillion miles).
The S.I. unit of distance is the metres, which is basically the distance between any two points.
A meter does not have weight - it is a unit of distance.
The standard unit label for distance is meters (m).
The SI base unit of distance is the meter (m).