Across
- 2. A rotating neutron star emitting beams of radiation at regular intervals. (PULSAR)
- 5. Variable stars with a well-defined relation between their luminosity and period. (CEPHEIDS)
- 8. The region around Earth dominated by its magnetic field. (MAGNETOSPHERE)
- 9. A developing star not yet hot enough for nuclear fusion. (PROTOSTAR)
- 11. A method of measuring distances to nearby stars by observing their apparent shift. (PARALLAX)
- 12. A group of stars forming a recognizable pattern. (CONSTELLATION)
- 14. A planet orbiting a star outside our solar system. (EXOPLANET)
- 16. A telescope that uses mirrors to gather and focus light. (REFLECTOR)
Down
- 1. A large group of smaller galaxy clusters or galaxy groups. (SUPERCLUSTER)
- 3. Flattened circle orbit shape (Ellipse).
- 4. The four largest moons of Jupiter discovered by Galileo. (GALILEAN)
- 6. Study of separated light (Spectroscopy).
- 7. An extremely luminous active galactic nucleus with a supermassive black hole. (QUASAR)
- 10. A large, cool star in the late stage of stellar evolution. (RED GIANT)
- 13. A temporary dark area on the Sun's surface caused by magnetic activity. (SUNSPOT)
- 15. A measure of an orbit's deviation from a perfect circle. (ECCENTRICITY)