Graduate of Fuhua Astronomy

2. The closest star to Earth except the Sun.
9. The colour of a star if it has a surface temperature of 20,000 K.
10. The element which causes Venus to appear yellow.
12. The classification of planets like Mercury, Venus, Earth and Mars.
13. The brightest star in Earth’s night sky.
14. The visible surface of the Sun.
16. The minimum distance to which large objects can approach its primary body without being torn apart by strong forces.
17. The classification of planets like Jupiter, Saturn, Uranus and Neptune.

1. The layer of super heated gas found surrounding the Sun.
3. The scattering of light from small particles which are up to a tenth of the wavelength of light.
4. The scattering of light from large particles which are up to 10 μm in size.
5. When the Sun crosses the plane of the Earth’s equator, making night and day of approximately equal length all over the Earth.
6. A pattern of stars that is recognized in the Earth’s night sky and appears as part of a constellation.
7. The compound which causes Mars to appear reddish.
8. The intrinsic property of a star that is sometimes referred to as the star’s absolute brightness.
11. The constellation which the Big Dipper is a part of.
15. An astronomical event that occurs twice a year as the Sun reaches its highest or lowest point relative to Earth’s equator.