science

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Across
  1. 2. brightness-brightness as seen from Earth
  2. 5. brightness-the brightness a star would have if it were a standard
  3. 7. hole-an object with gravity so strong that nothing, not even light, can escape
  4. 9. and brightness,
  5. 10. dwarf-the cooler, blue-white core
Down
  1. 1. large cloud of gas and dust in an enormous volume
  2. 3. protostar-the earliest stage of a star
  3. 4. star-remains of high-mass stars
  4. 6. sequence-in the H-R diagram, the diagonal where most of the stars
  5. 8. spinning neutron stars