Exploring the Cosmos - Degree Exam 2010 - Life and Death of Stars (Part 1)
1. Roughly how much wider is our Sun to the Earth?
10 times wider
1000 times wider
100 times wider
10 000 times wider
2. Into which spectral classification group does our Sun fall into?
O
G
B
M
3. What is the range of surface temperatures of stars on the Main Sequence of the Hertzsprung-Russell diagram?
30 000 to 300 000 K
3 000 to 30 000 K
300 000 to 3 000 000 K
300 to 3 000 K
4. Which luminosity class corresponds to Main Sequence stars?
IV
II
V
III
5. Which of the following correctly lists the spectral classifications of stars in order of decreasing surface temperature.
OMAKFGB
OGAFKBM
OBAFGKM
OFABGKM
6. What is the most abundant element in our universe?
Helium
Iron
Hydrogen
Oxygen
7. What name is given to the process by which carbon atoms are formed from helium atoms?
Triple-alpha process
Primordial nucleosynthesis process
Helium capture process
Photodisintegration process
8. Which of the following is NOT a type of binary star?
Transverse
Astrometric
Visual
Spectroscopic
9. What is the approximate temperature of the corona of our Sun?
2 million K
10 000 K
5 800 K
15 million K
10. 61 Cygni gets its name from the system introduced by John Flamsteed in the 18th century. How was this name derived?
It was discovered in 1861.
It was the 61st star from the west in its constellation.
It was the 61st star Flamsteed discovered.
It can be seen 61 degrees up from the horizon.
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