Across
- 4. first person to suggest the idea of an artificial satellite
- 5. 2019 Nobel Prize winner for Physics for physical cosmology
- 7. discovered in the year 1998 using Type Ia supernovae?
- 8. In which galaxy was a black hole discovered in the year 2017
- 10. Albert Einstein received the Nobel Prize for Physics for
- 15. What is a group of old stars closely packed in a symmetrical form called?
- 16. scientific term used for the twinkling of stars
- 17. The day is longer than a year on
- 18. part of the Sun can be seen with the naked eye
- 19. day on which the Sun’s direct rays cross the celestial equator is called
Down
- 1. visible part of the Sun
- 2. Who discovered the laws of planetary motion
- 3. The amount of light emitted by an object in a unit of time is known as
- 6. What is the dark centre of a sunspot called?
- 9. this planet's axis is almost parallel to its orbital plane, making it spin nearly on its side
- 11. Who invented the telescope?
- 12. The atmosphere of Mars is mostly composed of
- 13. Who developed the theory of auroral phenomena?
- 14. planet that spins backwards compared to the others
