Space

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Across
  1. 2. Measure of disorder in a thermodynamic system.
  2. 9. Science of the universe’s large-scale structure and origins.
  3. 11. A neutron star with an insanely powerful magnetic field.
  4. 12. Mysterious force driving cosmic acceleration.
  5. 13. The stage a star enters before collapsing or shedding layers.
  6. 16. The “point of no return” around a black hole.
  7. 17. Fundamental quantum of action in physics.
  8. 18. A swirling ring of dust and gas forming planets.
  9. 19. Tiny space debris that can puncture spacecraft hulls.
  10. 20. Nearly massless subatomic particle that rarely interacts with matter.
Down
  1. 1. Technique for identifying materials by light absorption/emission.
  2. 3. The infinitely dense point at a black hole’s center.
  3. 4. Atmospheric light caused by charged solar particles.
  4. 5. Catastrophic explosion marking a massive star’s death.
  5. 6. Extremely luminous galactic nucleus powered by a supermassive black hole.
  6. 7. Existing or occurring between stars.
  7. 8. Gravitational sweet spot for spacecraft stability.
  8. 10. Hypothetical quantum particle of gravity.
  9. 14. The study of life’s potential beyond Earth.
  10. 15. A world orbiting a star outside our solar system.