ASP Knowledge 2 — Questions and Answers
Question 1: Which type of telescope uses a mirror as its primary light-collecting element?
- Refractor
- Reflector (Correct answer)
- Binocular
- Spectroscope
Correct answer: Reflector
Reflector telescopes use a concave mirror to collect and focus light, unlike refractors which use lenses.
Question 2: What is the term for the apparent shift in a star's position caused by Earth's orbital motion around the Sun?
- Proper motion
- Parallax (Correct answer)
- Precession
- Aberration
Correct answer: Parallax
Stellar parallax is the apparent shift in a nearby star's position relative to distant background stars as Earth orbits the Sun.
Question 3: Which layer of the Sun is responsible for the energy we receive as visible light?
- Corona
- Chromosphere
- Photosphere (Correct answer)
- Radiative zone
Correct answer: Photosphere
The photosphere is the visible surface of the Sun and the layer from which most of the Sun's visible light is emitted.
Question 4: What is the name of the galaxy closest to the Milky Way (excluding dwarf satellites)?
- Triangulum Galaxy
- Andromeda Galaxy (Correct answer)
- Whirlpool Galaxy
- Centaurus A
Correct answer: Andromeda Galaxy
The Andromeda Galaxy (M31) is the closest large spiral galaxy to the Milky Way, at about 2.5 million light-years away.
Question 5: What causes a lunar eclipse?
- The Moon passes between Earth and Sun
- Earth passes between the Sun and Moon (Correct answer)
- The Moon enters Jupiter's shadow
- A solar flare blocks moonlight
Correct answer: Earth passes between the Sun and Moon
A lunar eclipse occurs when Earth passes between the Sun and the Moon, casting Earth's shadow onto the Moon.
Question 6: What is the Hertzsprung-Russell diagram primarily used to show?
- Planetary orbits around stars
- The relationship between stellar luminosity and temperature (Correct answer)
- Galaxy rotation curves
- Comet trajectories
Correct answer: The relationship between stellar luminosity and temperature
The H-R diagram plots stars by their luminosity versus surface temperature, revealing distinct groups like the main sequence and giant branches.
Question 7: Which unit is commonly used to express distances within our solar system?
- Light-year
- Parsec
- Astronomical Unit (Correct answer)
- Megaparsec
Correct answer: Astronomical Unit
The Astronomical Unit (AU) is the average Earth-Sun distance (~150 million km) and is the standard unit for solar system distances.
ASP Knowledge 2
Which type of telescope uses a mirror as its primary light-collecting element?