1. Review Quiz No. 11
coronal mass ejections.
spicules.
looped prominences.
sun spots.
convection events.
Question 1: Explosive events related to the acceleration of high-energy particles near the sun which can reach Earth and interfere with the Earth’s magnetosphere are known as …
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2. more than 10 pc.
equal to 10 pc.
less than 10 pc.
equal to 10 light years.
… That doesn’t tell us anything about its distance!
Question 2: If a star has an apparent magnitude of mV = 3.5 and an absolute magnitude of MV = 4.9, we know that its distance from Earth must be …
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3. 0.033 parsec.
0.033 light years.
30 parsec.
30 light years.
9.2 light years.
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Question 3: For the star Canopus, we measure a trigonometric parallax of arc seconds. What is Canopus’ distance from Earth? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

4. Question 4: The method of the trigonometric parallax to measure distances to nearby stars uses the distance between … as a base line for triangulation.
the astronomer’s two eyes
two telescopes on opposite sides of the Earth
the Earth and the moon
the Earth and the sun
the sun and Alpha Centauri
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