Kerr-Newman black hole
The simplest kind of a rotating, electrically charged black hole: a model universe containing a single rotating, charged black hole and nothing else. This solution to Einstein's equations was found independently by Roy Kerr and Ted Newman in 1963. The ...
Kerr black hole
The simplest kind of a rotating black hole: a model universe containing a single rotating black hole and nothing else. This solution to Einstein's equations was found by Roy Kerr in ...
Kepler’s laws
Basic laws governing the orbital motions of planets around the sun. First law: Each planetary orbit is an ellipse, with the sun in one of its focus points. Second law: If you connect the planet and the sun by an imaginary line then, in equal time intervals, ...
Kelvin scale
The temperature scale used in physics, synonym: absolute temperature. The zero point of the Kelvin scale is at absolute zero; a temperature difference of one Kelvin (abbreviated 1 K and, rarely, also called one "degree Kelvin") is the same as a temperature ...
Karlstad University
University (enrolment ca. 10,000) in central Sweden. Research areas include a number of relativistic topics, from string theory to the mathematics of general relativity. Karlstad University ...
Joule
The unit of energy in the International System of units (SI). One Joule is equal to one kilogram times square metre over square second, in short: 1 J = 1 kg m²/s². It is equal to the kinetic energy gained by an object of the mass one kilogram that has been ...
jets
In the context of astronomy: strongly focussed, highly energetic particle streams like those emitted by certain active galactic nuclei. Jets can become visible when they deposit their energy in a huge gaseous region, making them shine out bright (so-called ...
isotope
Different species of atomic nuclei which contain the same number of protons (and thus represent the same chemical element), but different numbers of neutrons, are called isotopes. Thus, helium-4 (two protons, two neutrons) and helium-3 (two protons, one ...
