Space Trivia Quiz
Questions: 16 · 10 minutes
1. Mars sometimes appears to move backward against the background stars. What best explains this apparent retrograde motion?
The viewing angle changes as Earth and Mars move at different speeds in their orbits
The background stars orbit Mars in the opposite direction
Mars is pushed backward by the gravity of Jupiter
Mars briefly reverses the direction of its orbit
2. A massive star explodes as a supernova, and its collapsed core remains extremely dense but does not become a black hole. What remnant may form?
A rocky planet
A comet nucleus
A neutron star
A red giant
3. A star’s brightness dips by a small, similar amount at regular intervals. Which explanation would astronomers investigate as evidence of an exoplanet?
The star repeatedly leaves the galaxy
The star’s gravity switches off at regular intervals
A planet repeatedly passes between the star and the observer
A nearby planet reflects extra light toward the star
4. Which alignment is required for a solar eclipse to occur?
Earth is between the Sun and the Moon
The Sun is between Earth and the Moon
Earth, the Sun, and the Moon form a right angle
The Moon is between the Sun and Earth
5. Why do astronauts aboard the International Space Station appear weightless even though Earth’s gravity is still acting on them?
The station is beyond the reach of Earth’s gravity
They and the station are continuously falling around Earth together
The station produces a force that cancels gravity
Vacuum removes the mass that gives them weight
6. What is the main reason Earth experiences seasons?
Earth rotates faster during the warmer months
Earth’s distance from the Sun changes dramatically during the year
The Sun produces substantially more energy in summer
Earth’s axis is tilted relative to the plane of its orbit
7. Sunlight takes about eight minutes to reach Earth. What does that mean when you look at the Sun using proper solar-viewing equipment?
You see the Sun as it will appear eight minutes later
You see only light reflected from Earth’s atmosphere
You see the Sun’s current surface but its earlier position
You see the Sun as it was about eight minutes earlier
8. Which visible color generally indicates the hottest stellar surface?
Orange
Red
Blue
Yellow
9. What is the event horizon of a black hole?
The bright stellar surface surrounding every black hole
The central point where a planet forms
The boundary beyond which nothing can escape to an outside observer
The outer edge of the galaxy containing the black hole
10. A nearby galaxy’s spectral lines are shifted toward longer, redder wavelengths compared with laboratory measurements. What does this redshift generally indicate?
The galaxy contains no stars
The galaxy is moving away from the observer
The galaxy is moving toward the observer
The galaxy has stopped rotating
11. What general type of galaxy is the Milky Way?
A ring galaxy
An elliptical galaxy
An irregular galaxy
A barred spiral galaxy
12. What does a parsec measure?
Distance
Time
Stellar brightness
Orbital speed
13. An icy object develops a glowing coma and tail as it approaches the Sun. What type of object is it?
An asteroid
A comet
A dwarf planet
A meteoroid entering Earth’s atmosphere
14. Which planet is best known for its broad, bright ring system?
Saturn
Jupiter
Uranus
Neptune
15. Over a month, the Moon appears as a crescent, half circle, gibbous shape, and full disk. What causes these phases?
We see changing portions of the Moon’s sunlit half as it orbits Earth
Clouds in Earth’s atmosphere block changing parts of the Moon
The Moon produces different amounts of light during its orbit
Earth’s shadow covers different portions of the Moon each night
16. An astronaut travels from Earth to the Moon without changing mass. How does the astronaut’s weight on the Moon compare with the weight on Earth?
It is greater because the Moon has no atmosphere
It is lower because the Moon’s surface gravity is weaker
It is unchanged because mass and weight are identical
It becomes zero because gravity exists only on planets