Across
- 2. a spherical shell around our solar system
- 5. explosion of stars
- 7. area of immense gravity, even light can not escape it
- 8. compact area in the centre of galaxy and one of the brightest objects in the universe
- 11. northern lights
- 12. constellation of stars
- 13. donut-shaped ring of icy objects beyond the orbit of neptune
- 14. waves coming from solar flares and exploding stars
- 15. bright but dwarf star, yielding a larger rate of emission
- 16. objects that give off short rhythmic bursts of visible lights, X-rays, gamma rays
Down
- 1. an exoplanet
- 3. brightest stars and young supergiant in orion constellation
- 4. southern lights
- 6. cloud of dust or gas found between stars
- 9. an icy moon of uranus
- 10. huge gas balls that have not yet become full-fledged sars