24 relations: Astronomical unit, Astronomy, Distance, Earth, International Astronomical Union, Jupiter, Kilometre, Light-second, Light-year, Metre, Mile, Optical depth (astrophysics), Orders of magnitude (length), Parker Solar Probe, Parsec, Photosphere, Radius, Solar and Heliospheric Observatory, Solar luminosity, Solar mass, Solar Orbiter, Star, Stellar rotation, Sun.
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
Astronomy (from ἀστρονομία) is a natural science that studies celestial objects and phenomena.
Distance is a numerical measurement of how far apart objects are.
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
The International Astronomical Union (IAU; Union astronomique internationale, UAI) is an international association of professional astronomers, at the PhD level and beyond, active in professional research and education in astronomy.
Jupiter is the fifth planet from the Sun and the largest in the Solar System.
The kilometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: km; or) or kilometer (American spelling) is a unit of length in the metric system, equal to one thousand metres (kilo- being the SI prefix for). It is now the measurement unit used officially for expressing distances between geographical places on land in most of the world; notable exceptions are the United States and the road network of the United Kingdom where the statute mile is the official unit used.
The light-second is a unit of length useful in astronomy, telecommunications and relativistic physics.
The light-year is a unit of length used to express astronomical distances and measures about 9.5 trillion kilometres or 5.9 trillion miles.
The metre (British spelling and BIPM spelling) or meter (American spelling) (from the French unit mètre, from the Greek noun μέτρον, "measure") is the base unit of length in some metric systems, including the International System of Units (SI).
The mile is an English unit of length of linear measure equal to 5,280 feet, or 1,760 yards, and standardised as exactly 1,609.344 metres by international agreement in 1959.
Optical depth in astrophysics refers to a specific level of transparency.
The following are examples of orders of magnitude for different lengths.
Parker Solar Probe (previously Solar Probe, Solar Probe Plus, or Solar Probe+) is a planned NASA robotic spacecraft to probe the outer corona of the Sun.
The parsec (symbol: pc) is a unit of length used to measure large distances to astronomical objects outside the Solar System.
The photosphere is a star's outer shell from which light is radiated.
In classical geometry, a radius of a circle or sphere is any of the line segments from its center to its perimeter, and in more modern usage, it is also their length.
The Solar and Heliospheric Observatory (SOHO) is a spacecraft built by a European industrial consortium led by Matra Marconi Space (now Astrium) that was launched on a Lockheed Martin Atlas II AS launch vehicle on December 2, 1995, to study the Sun, and has discovered over 3000 comets.
The solar luminosity,, is a unit of radiant flux (power emitted in the form of photons) conventionally used by astronomers to measure the luminosity of stars, galaxies and other celestial objects in terms of the output of the Sun.
The solar mass is a standard unit of mass in astronomy, equal to approximately.
Solar Orbiter (SolO) is a planned Sun-observing satellite, under development by the European Space Agency (ESA).
A star is type of astronomical object consisting of a luminous spheroid of plasma held together by its own gravity.
Stellar rotation is the angular motion of a star about its axis.
The Sun is the star at the center of the Solar System.