Space & Stars

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Across
  1. 2. an area of such immense gravity that nothing—not even light—can escape from it.
  2. 6. a powerful explosion of a star that occurs during the last stages of a massive star.
  3. 8. a reaction that uses up hydrogen to produce helium and energy.
  4. 10. the collapsed core of a massive supergiant star
  5. 12. the star at the center of our solar system.
  6. 13. a dying star in the final stages of stellar evolution.
Down
  1. 1. a stellar core left behind after a dying star has run out of nuclear fuel.
  2. 3. a colourless, odourless, highly flammable gas, the chemical element of atomic number 1.
  3. 4. a cloud of gas and dust in space believed to develop into a star.
  4. 5. a star with a hot and dense core
  5. 7. a very small cooled remnant of a white dwarf that emits no detectable light.
  6. 9. the force that attracts a body towards the centre of the earth, or towards any other physical body having mass.
  7. 11. a giant cloud of dust and gas