37 relations: Absolute magnitude, Accretion disk, Active galactic nucleus, Apparent magnitude, Astronomical unit, Big Bang, Blazar, Cepheus (constellation), Constellation, Earth, Eddington luminosity, Elliptical galaxy, Epoch (astronomy), Gamma ray, Gravitational energy, Hawking radiation, Infrared spectroscopy, Large Magellanic Cloud, List of most massive black holes, Luminosity, Messier 87, Milky Way, Observable universe, OVV quasar, Pluto, Quasar, Radiation pressure, Radio wave, Schwarzschild radius, Sixth Cambridge Survey of Radio Sources, Solar mass, Starburst galaxy, Sun, Supermassive black hole, University of Cambridge, Watt, X-ray.
Absolute magnitude is a measure of the luminosity of a celestial object, on a logarithmic astronomical magnitude scale.
An accretion disk is a structure (often a circumstellar disk) formed by diffused material in orbital motion around a massive central body.
An active galactic nucleus (AGN) is a compact region at the center of a galaxy that has a much higher than normal luminosity over at least some portion—and possibly all—of the electromagnetic spectrum, with characteristics indicating that the excess luminosity is not produced by stars.
The apparent magnitude of a celestial object is a number that is a measure of its brightness as seen by an observer on Earth.
The astronomical unit (symbol: au, ua, or AU) is a unit of length, roughly the distance from Earth to the Sun.
The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution.
A blazar is a very compact quasar (quasi-stellar radio source) associated with a presumed supermassive black hole at the center of an active, giant elliptical galaxy.
Cepheus is a constellation in the northern sky, which is named after Cepheus (a King in the Greek mythology).
A constellation is a group of stars that are considered to form imaginary outlines or meaningful patterns on the celestial sphere, typically representing animals, mythological people or gods, mythological creatures, or manufactured devices.
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
The Eddington luminosity, also referred to as the Eddington limit, is the maximum luminosity a body (such as a star) can achieve when there is balance between the force of radiation acting outward and the gravitational force acting inward.
An elliptical galaxy is a type of galaxy having an approximately ellipsoidal shape and a smooth, nearly featureless image.
In astronomy, an epoch is a moment in time used as a reference point for some time-varying astronomical quantity, such as the celestial coordinates or elliptical orbital elements of a celestial body, because these are subject to perturbations and vary with time.
A gamma ray or gamma radiation (symbol γ or \gamma), is penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei.
Gravitational energy is the potential energy a body with mass has in relation to another massive object due to gravity.
Hawking radiation is blackbody radiation that is predicted to be released by black holes, due to quantum effects near the event horizon.
Infrared spectroscopy (IR spectroscopy or vibrational spectroscopy) involves the interaction of infrared radiation with matter.
The Large Magellanic Cloud (LMC) is a satellite galaxy of the Milky Way.
This is an ordered list of the most massive black holes so far discovered (and probable candidates), measured in units of solar masses, or the mass of the Sun (approx. kilograms).
In astronomy, luminosity is the total amount of energy emitted per unit of time by a star, galaxy, or other astronomical object.
Messier 87 (also known as Virgo A or NGC 4486, generally abbreviated to M87) is a supergiant elliptical galaxy in the constellation Virgo.
The Milky Way is the galaxy that contains our Solar System.
The observable universe is a spherical region of the Universe comprising all matter that can be observed from Earth at the present time, because electromagnetic radiation from these objects has had time to reach Earth since the beginning of the cosmological expansion.
An optically violent variable quasar (often abbreviated as OVV quasar) is a type of highly variable quasar.
Pluto (minor planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune.
A quasar (also known as a QSO or quasi-stellar object) is an extremely luminous active galactic nucleus (AGN).
Radiation pressure is the pressure exerted upon any surface due to the exchange of momentum between the object and the electromagnetic field.
Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light.
The Schwarzschild radius (sometimes historically referred to as the gravitational radius) is a physical parameter that shows up in the Schwarzschild solution to Einstein's field equations, corresponding to the radius defining the event horizon of a Schwarzschild black hole.
The 6C Survey of Radio Sources (6C) is an astronomical catalogue of celestial radio sources as measured at 151-MHz.
The solar mass is a standard unit of mass in astronomy, equal to approximately.
A starburst galaxy is a galaxy undergoing an exceptionally high rate of star formation, as compared to the long-term average rate of star formation in the galaxy or the star formation rate observed in most other galaxies.
The Sun is the star at the center of the Solar System.
A supermassive black hole (SMBH or SBH) is the largest type of black hole, on the order of hundreds of thousands to billions of solar masses, and is found in the centre of almost all currently known massive galaxies.
The University of Cambridge (informally Cambridge University)The corporate title of the university is The Chancellor, Masters, and Scholars of the University of Cambridge.
The watt (symbol: W) is a unit of power.
X-rays make up X-radiation, a form of electromagnetic radiation.