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