Stellar Remnants

4. the conservation of _____ _____ states that as long as there is no external torque, the total angular momentum of a set of interacting objects cannot change
6. Radiation that results from a splitting of a virtual particle-antiparticle pair at the event horizon of a black hole.
7. very dense stellar remnants or "dead" stars whose radii are much smaller than the Sun's. These stars include white dwarfs, neutron stars, and black holes
10. the distance from the center to the event horizon in any black hole
11. An object in space whose gravity is so strong not even light can escape. Resulting from the death of very high mass stars.
12. the small, dense remains of a high-mass star after a supernova

1. the location around a black hole where the escape velovity equals the speed of light; the boundary of a black hole
2. a type of pressure unrelated to an object's temperature that arises when electrons or neutrons are packed so tightly that the exclusion/uncertainty principles come into play
3. A binary star system that emits substantial amounts of X rays, thought to be from an accretion disk around a neutron star or black hole.
5. The lengthening of the wavelength of a photon due to its escape from a gravitational field.
8. the maximum mass of a white dwarf above which it collapses. Approximately 1.4 solar masses.
9. the minimum velocity needed to escape a gravitational field