AST Unit 12 - Stellar Remnants and Black Holes

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Across
  1. 1. 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
  2. 8. 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.
  3. 9. the location around a black hole where the escape velovity equals the speed of light; the boundary of a black hole
  4. 10. 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
  5. 11. the small, dense remains of a high-mass star after a supernova
  6. 12. Radiation that results from a splitting of a virtual particle-antiparticle pair at the event horizon of a black hole.
Down
  1. 2. as long as there is no external torque, the total angular momentum of a set of interacting objects cannot change
  2. 3. the maximum mass of a white dwarf above which it collapses. Approximately 1.4 solar masses.
  3. 4. An object in space whose gravity is so strong not even light can escape. Resulting from the death of very high mass stars.
  4. 5. The lengthening of the wavelength of a photon due to its escape from a gravitational field.
  5. 6. the distance from the center to the event horizon in any black hole
  6. 7. the minimum velocity needed to escape a gravitational field