ASA 107 – Celestial Navigation General Questions
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Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
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1. What star provides energy for life on Earth? - Correct Answer: The Sun.
2. How far is the Earth from the center of the Milky Way Galaxy? - Correct
Answer: A little less than 30,000 light-years.
3. Why can't we see all the stars in the Milky Way Galaxy? - Correct
Answer: Dust between stars blocks the light.
4. What is the smallest piece of an element that retains its properties? -
Correct Answer: An atom.
5. What do astronomers mean by the term universe? - Correct Answer:
Everything that we can observe.
6. Which of the following is the Earth NOT located in? - Correct Answer:
We are located in all of the above.
,7. Why are astronomers compared to detectives? - Correct Answer: They
must test their hypotheses against evidence.
8. What did modern observatories gain around 1610 that older ones lacked? -
Correct Answer: Telescopes.
9. What is the most important function of an astronomical telescope? -
Correct Answer: To collect as much light as possible and bring it to a focus.
10.Who was the first person to regularly publish astronomical telescope
observations? - Correct Answer: Galileo Galilei.
11.What is the size of the light-collecting component of a telescope called? -
Correct Answer: Aperture.
12.What type of telescopes were used first by astronomers? - Correct
Answer: Refractors.
13.What focus does a telescope use where light passes through a hole in the
primary mirror? - Correct Answer: Cassegrain focus.
14.Where is the world's largest refracting telescope located? - Correct
Answer: Yerkes Observatory.
,15.In a 14-inch telescope, what does the 14 describe? - Correct Answer:
The diameter of the primary lens or mirror.
16.What kind of telescope is best for observing very faint galaxies? -
Correct Answer: A telescope with the largest possible aperture.
17.Which is NOT an advantage of reflector telescopes? - Correct Answer:
They eliminate atmospheric twinkling.
18.What do modern large visible-light telescopes primarily use to collect light?
- Correct Answer: Mirrors.
19.For best resolution when studying Jupiter, what should astronomers use? -
Correct Answer: A large reflector above Earth's atmosphere.
20.What does adaptive optics help astronomers overcome? - Correct
Answer: Distortion from Earth's atmosphere.
21.Why do telescopes need precise motorized drive systems? - Correct
Answer: Because Earth rotates.
22.What is the best astronomical site location? - Correct Answer: A tall, dry
mountain peak.
, 23.What made the Keck telescopes unique? - Correct Answer: Segmented
mirrors working together.
24.Which factor is NOT important when selecting telescope sites? - Correct
Answer: Being near a university.
25.What is rapidly reshaping mirrors called? - Correct Answer: Adaptive
optics.
26.How are modern telescope images typically recorded? - Correct
Answer: With CCD detectors.
27.Which detectors can collect light longer than the human eye? - Correct
Answer: CCD and photographic detectors.
28.What does an observatory plate collection contain? - Correct Answer:
Glass plates with light-sensitive coatings.
29.Which item is NOT considered a radiation detector? - Correct Answer: A
refracting telescope.
30.What action would NOT help infrared astronomy? - Correct Answer:
Heating the telescope.
Comprehensive Resource To Help You Ace 2026-2027 Exams
Includes Frequently Tested Questions With ELABORATED
100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
Instant Download Pdf
1. What star provides energy for life on Earth? - Correct Answer: The Sun.
2. How far is the Earth from the center of the Milky Way Galaxy? - Correct
Answer: A little less than 30,000 light-years.
3. Why can't we see all the stars in the Milky Way Galaxy? - Correct
Answer: Dust between stars blocks the light.
4. What is the smallest piece of an element that retains its properties? -
Correct Answer: An atom.
5. What do astronomers mean by the term universe? - Correct Answer:
Everything that we can observe.
6. Which of the following is the Earth NOT located in? - Correct Answer:
We are located in all of the above.
,7. Why are astronomers compared to detectives? - Correct Answer: They
must test their hypotheses against evidence.
8. What did modern observatories gain around 1610 that older ones lacked? -
Correct Answer: Telescopes.
9. What is the most important function of an astronomical telescope? -
Correct Answer: To collect as much light as possible and bring it to a focus.
10.Who was the first person to regularly publish astronomical telescope
observations? - Correct Answer: Galileo Galilei.
11.What is the size of the light-collecting component of a telescope called? -
Correct Answer: Aperture.
12.What type of telescopes were used first by astronomers? - Correct
Answer: Refractors.
13.What focus does a telescope use where light passes through a hole in the
primary mirror? - Correct Answer: Cassegrain focus.
14.Where is the world's largest refracting telescope located? - Correct
Answer: Yerkes Observatory.
,15.In a 14-inch telescope, what does the 14 describe? - Correct Answer:
The diameter of the primary lens or mirror.
16.What kind of telescope is best for observing very faint galaxies? -
Correct Answer: A telescope with the largest possible aperture.
17.Which is NOT an advantage of reflector telescopes? - Correct Answer:
They eliminate atmospheric twinkling.
18.What do modern large visible-light telescopes primarily use to collect light?
- Correct Answer: Mirrors.
19.For best resolution when studying Jupiter, what should astronomers use? -
Correct Answer: A large reflector above Earth's atmosphere.
20.What does adaptive optics help astronomers overcome? - Correct
Answer: Distortion from Earth's atmosphere.
21.Why do telescopes need precise motorized drive systems? - Correct
Answer: Because Earth rotates.
22.What is the best astronomical site location? - Correct Answer: A tall, dry
mountain peak.
, 23.What made the Keck telescopes unique? - Correct Answer: Segmented
mirrors working together.
24.Which factor is NOT important when selecting telescope sites? - Correct
Answer: Being near a university.
25.What is rapidly reshaping mirrors called? - Correct Answer: Adaptive
optics.
26.How are modern telescope images typically recorded? - Correct
Answer: With CCD detectors.
27.Which detectors can collect light longer than the human eye? - Correct
Answer: CCD and photographic detectors.
28.What does an observatory plate collection contain? - Correct Answer:
Glass plates with light-sensitive coatings.
29.Which item is NOT considered a radiation detector? - Correct Answer: A
refracting telescope.
30.What action would NOT help infrared astronomy? - Correct Answer:
Heating the telescope.
