55 relations: Active galactic nucleus, Apple, Astronomical object, Big Bang, Black hole, Boson, Carlo Rovelli, Chandra X-ray Observatory, Chiral anomaly, Compact star, Dark matter, Dark star (Newtonian mechanics), Degenerate matter, Density, Down quark, Electron, Electroweak interaction, Energy density, Event horizon, Exotic matter, Fermion, Gamma ray, Glueball, Gravitational collapse, Gravitational lens, Gravity, Kilogram per cubic metre, Lepton, Loop quantum gravity, MIT Technology Review, Muon, Neutron, Neutron star, Neutronium, New Scientist, Nucleon, Orders of magnitude (density), Particle accelerator, Planck units, Preon, Proton, Q star, QCD matter, Quark, Quark star, Radiation pressure, RX J1856.5-3754, Schwarzschild radius, Science Daily, Softpedia, ..., Star, Strange matter, Supernova, Up quark, 3C 58. Expand index (5 more) » « Shrink index
An active galactic nucleus (AGN) is a compact region at the centre of a galaxy that has a much higher than normal luminosity over at least some portion – and possibly all – of the electromagnetic spectrum.
The apple tree (Malus domestica) is a deciduous tree in the rose family best known for its sweet, pomaceous fruit, the apple.
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An astronomical object or celestial object is a naturally occurring physical entity, association, or structure that current science has demonstrated to exist in the observable universe.
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The Big Bang theory is the prevailing cosmological model for the universe from the earliest known periods through its subsequent large-scale evolution.
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A black hole is a geometrically defined region of spacetime exhibiting such strong gravitational effects that nothing—including particles and electromagnetic radiation such as light—can escape from inside it.
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In quantum mechanics, a boson is a particle that follows Bose–Einstein statistics.
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Carlo Rovelli (born 3 May 1956) is an Italian theoretical physicist and writer who has worked in Italy and the USA, and currently works in France.
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The Chandra X-ray Observatory (CXO), previously known as the Advanced X-ray Astrophysics Facility (AXAF), is a space observatory launched on STS-93 by NASA on July 23, 1999.
In physics, a chiral anomaly is the anomalous nonconservation of a chiral current.
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In astronomy, the term compact star (sometimes compact object) is used to refer collectively to white dwarfs, neutron stars, other exotic dense stars, and black holes.
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Dark matter is a hypothetical kind of matter that cannot be seen with telescopes but would account for most of the matter in the universe.
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A dark star is a theoretical object compatible with Newtonian mechanics that, due to its large mass, has a surface escape velocity that equals or exceeds the speed of light.
Degenerate matter in physics is a collection of free, non-interacting particles with a pressure and other physical characteristics determined by quantum mechanical effects.
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The density, or more precisely, the volumetric mass density, of a substance is its mass per unit volume.
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The down quark or d quark (symbol: d) is the second-lightest of all quarks, a type of elementary particle, and a major constituent of matter.
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The electron is a subatomic particle, symbol or, with a negative elementary electric charge.
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In particle physics, the electroweak interaction is the unified description of two of the four known fundamental interactions of nature: electromagnetism and the weak interaction.
Energy density is the amount of energy stored in a given system or region of space per unit volume or mass, though the latter is more accurately termed specific energy.
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In general relativity, an event horizon is a boundary in spacetime beyond which events cannot affect an outside observer.
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In physics, Exotic Matter is matter that somehow deviates from normal matter and has "exotic" properties.
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In particle physics, a fermion (a name coined by Paul Dirac from the surname of Enrico Fermi) is any particle characterized by Fermi–Dirac statistics.
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Gamma radiation, also known as gamma rays, and denoted by the Greek letter γ, refers to electromagnetic radiation of an extremely high frequency and therefore consists of high-energy photons.
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In particle physics, a glueball is a hypothetical composite particle.
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Gravitational collapse is the inward fall of an astronomical object due to the influence of its own gravity which tends to draw the object toward its center of mass.
A gravitational lens refers to a distribution of matter (such as a cluster of galaxies) between a distant source and an observer, that is capable of bending the light from the source, as it travels towards the observer.
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Gravity or gravitation is a natural phenomenon by which all things with mass are brought towards (or 'gravitate' towards) one another including stars, planets, galaxies and even light and sub-atomic particles.
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Kilogram per cubic metre is an SI derived unit of density, defined by mass in kilograms divided by volume in cubic metres.
A lepton is an elementary, half-integer spin (spin) particle that does not undergo strong interactions, but is subject to the Pauli exclusion principle.
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Loop quantum gravity (LQG) is a theory that attempts to describe the quantum properties of the universe and gravity.
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MIT Technology Review is a magazine published by the Massachusetts Institute of Technology.
The muon (from the Greek letter mu (μ) used to represent it) is an elementary particle similar to the electron, with electric charge of −1 e and a 2, but with a much greater mass.
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The neutron is a subatomic particle, symbol or, with no net electric charge and a mass slightly larger than that of a proton.
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A neutron star is a type of compact star that can result from the gravitational collapse of a massive star after a supernova.
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Neutronium (sometimes shortened to neutrium) is a proposed name for a substance composed purely of neutrons.
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New Scientist is a UK-based weekly non-peer-reviewed English-language international science magazine, founded in 1956.
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In chemistry and physics, a nucleon is one of the particles that makes up the atomic nucleus.
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A particle accelerator is a device that uses electromagnetic fields to propel charged particles to high speeds and to contain them in well-defined beams.
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In physics, Planck units are physical units of measurement defined exclusively in terms of five universal physical constants listed below, in such a manner that these five physical constants take on the numerical value of 1 when expressed in terms of these units.
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In particle physics, preons are "point-like" particles, conceived to be subcomponents of quarks and leptons.
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A Q-Star, also known as a gray hole, is hypothetical type of a compact, heavy neutron star with an exotic state of matter.
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Quark matter or QCD matter refers to any of a number of theorized phases of matter whose degrees of freedom include quarks and gluons.
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A quark is an elementary particle and a fundamental constituent of matter.
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A quark star is a hypothetical type of compact exotic star composed of quark matter.
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Radiation pressure is the pressure exerted upon any surface exposed to electromagnetic radiation.
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RX J1856.5-3754 (also called RX J185635-3754, RX J185635-375, and various other designations) is a nearby neutron star in the constellation Corona Australis.
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The Schwarzschild radius (sometimes historically referred to as the gravitational radius) is the radius of a sphere such that, if all the mass of an object were to be compressed within that sphere, the escape velocity from the surface of the sphere would equal the speed of light.
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Science Daily is an American news website for topical science articles.
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Softpedia is a website that indexes information and provides primarily software information and downloads.
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A star is a luminous sphere of plasma held together by its own gravity.
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Strange matter is a particular form of quark matter, usually thought of as a “liquid” of up, down and strange quarks.
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A supernova is a stellar explosion that briefly outshines an entire galaxy, radiating as much energy as the Sun or any ordinary star is expected to emit over its entire life span, before fading from view over several weeks or months.
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The up quark or u quark (symbol: u) is the lightest of all quarks, a type of elementary particle, and a major constituent of matter.
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3C58 or 3C 58 is a pulsar and supernova remnant within the Milky Way that is possibly associated with the supernova SN 1181.
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