Space Phenomena

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Across
  1. 5. The process of a celestial body appearing to move backward in its orbit
  2. 6. A massive burst of solar wind and magnetic fields from the Sun
  3. 8. A natural satellite that orbits an asteroid
  4. 9. A magnetic storm on the Sun's surface
  5. 10. A rare alignment of celestial objects in a straight line
Down
  1. 1. The dark areas on the Moon's surface
  2. 2. The collision of two neutron stars
  3. 3. A violent explosion marking the death of a massive star
  4. 4. A temporary darkening of a star caused by an orbiting planet
  5. 7. The appearance of a second, dimmer moon next to the Earth's moon