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