ASTRO 1 EXAM 1 PSU EXAM SCRIPT 2026
UPDATED 50 QUESTIONS WITH ACCURATE
ANSWERS GRADED A+
⩥ Two planets have the same radius. If Planet A is 5 times more massive
than Planet B, how does gravity differ on the surfaces of the two
planets? Answer: Gravity is 5 times stronger on Planet A
⩥ Say that there was a planet X in our Solar System with a mass 1/4 the
mass of Earth and a radius 1/2 the radius of Earth. How will the gravity
on its surface compare to the surface gravity on Earth? Answer: Surface
gravity on planet X is the same as on Earth
⩥ A planet in a nearly circular orbit with its rotation axis tilted by 5
degrees relative to its orbital plane around its stars would... Answer:
Have seasons that are not very different from each other as compared to
Earth
⩥ The rotation axis of the Earth is ... Answer: tilted at about 23 degrees
relative to the axis of the Earth's orbit around the Sun.
⩥ A planet has its rotation tilted by 88% so that it is in the plane of its
orbit around its star. It rotates once every 46 hours. For how many hours
a day is it dark in the winter on its South pole? Answer: 46 hours
, ⩥ When is the waning gibbous highest in the sky? Answer: 3 am
⩥ If the Moon phase is full, what phase would the Earth appear to be in
when viewed from the Moon? Answer: New
⩥ At what time will the Moon set on the day of a Solar eclipse? Answer:
Sunset
⩥ Stars that are in the same constellation... Answer: are likely to be at
very different distances from us.
⩥ The North star is a star in the constellation of Ursa Minor, which lies
just above the North pole of Earth. Which of the following is true?
Answer: Ursa Minor is not a Zodiac constellation
⩥ A particular Zodiac constellation is high in the sky at midnight in
April. Where will it be in October? Answer: Near the Sun in the daytime
sky
⩥ What do you expect the spectrum of an object that is 1,000,000 Kelvin
to be like? Answer: It should peak at X-ray wavelengths
UPDATED 50 QUESTIONS WITH ACCURATE
ANSWERS GRADED A+
⩥ Two planets have the same radius. If Planet A is 5 times more massive
than Planet B, how does gravity differ on the surfaces of the two
planets? Answer: Gravity is 5 times stronger on Planet A
⩥ Say that there was a planet X in our Solar System with a mass 1/4 the
mass of Earth and a radius 1/2 the radius of Earth. How will the gravity
on its surface compare to the surface gravity on Earth? Answer: Surface
gravity on planet X is the same as on Earth
⩥ A planet in a nearly circular orbit with its rotation axis tilted by 5
degrees relative to its orbital plane around its stars would... Answer:
Have seasons that are not very different from each other as compared to
Earth
⩥ The rotation axis of the Earth is ... Answer: tilted at about 23 degrees
relative to the axis of the Earth's orbit around the Sun.
⩥ A planet has its rotation tilted by 88% so that it is in the plane of its
orbit around its star. It rotates once every 46 hours. For how many hours
a day is it dark in the winter on its South pole? Answer: 46 hours
, ⩥ When is the waning gibbous highest in the sky? Answer: 3 am
⩥ If the Moon phase is full, what phase would the Earth appear to be in
when viewed from the Moon? Answer: New
⩥ At what time will the Moon set on the day of a Solar eclipse? Answer:
Sunset
⩥ Stars that are in the same constellation... Answer: are likely to be at
very different distances from us.
⩥ The North star is a star in the constellation of Ursa Minor, which lies
just above the North pole of Earth. Which of the following is true?
Answer: Ursa Minor is not a Zodiac constellation
⩥ A particular Zodiac constellation is high in the sky at midnight in
April. Where will it be in October? Answer: Near the Sun in the daytime
sky
⩥ What do you expect the spectrum of an object that is 1,000,000 Kelvin
to be like? Answer: It should peak at X-ray wavelengths
