EAPS 105: Exam 1 Question and
answers verified to pass 2025/2026
What is a hot Jupiter?
A) The name given to Jupiter when it was very young and much hotter than it is today.
B) The name given to a Jupiter-sized exoplanet that orbits very close to its star.
C) A reference to the fact that, unlike Earth, Jupiter gives off heat.
D) Any gas giant planet where fusion takes place. - correct answer ✔B) The name given to a Jupiter-
sized exoplanet that orbits very close to its star.
According to Kepler's 3rd Law, which of the following influences the time it takes a planet to orbit the
Sun?
A) Its mass
B) Its density
C) Its orbital radius
D) Its spin rate - correct answer ✔C) Its orbital radius
Why do Mercury and Venus spin so slowly?
A) Because they have no moons
B) Because of gravitational interactions with other planets
C) They are close to being tidally locked by the Sun.
D) All the above - correct answer ✔C) They are close to being tidally locked by the Sun.
,Which type of nebula is comprised of hot hydrogen ions (H+) and glow?
A) Emission nebula
B) Molecular clouds
C) Dark nebula
D) All the above - correct answer ✔A) Emission nebula
What do planetary nebulae have to do with planets?
A) Planets form from them
B) They are made from the destruction of planets
C) They are similar to gas giants
D) Nothing - correct answer ✔D) Nothing
What do supernovas do that fusion in the cores of stars cannot?
A) Create the heaviest elements in the universe
B) Create heat and light
C) Create iron
D) All the above - correct answer ✔A) Create the heaviest elements in the universe
Which is a possible consequences of the future flyby of the star Gliese 710?
A) Showers of comets will head into the inner Solar System from the Oort Cloud.
B) The orbits of the planets will be significantly altered.
, C) Several dwarf planets from the Kuiper Belt will be kicked out of the Solar System.
D) All the above - correct answer ✔A) Showers of comets will head into the inner Solar System from the
Oort Cloud.
Where is the easiest place to find meteorites (if you can get there)?
A) Antarctica
B) Australia
C) Sahara Desert
D) Northern Canada - correct answer ✔A) Antarctica
What is an astronomical unit (AU)?
A) The time it takes late to travel from the Sun to the Earth
B) The distance from the Sun to the Earth
C) The mass of the Sun
D) The distance that light travels in one second - correct answer ✔B) The distance from the Sun to the
Earth
What is the force that enable dust particles to accrete to each other?
A) Gravitational forces
B) Magnetism
C) Electrostatic attraction
D) Radiation - correct answer ✔C) Electrostatic attraction
answers verified to pass 2025/2026
What is a hot Jupiter?
A) The name given to Jupiter when it was very young and much hotter than it is today.
B) The name given to a Jupiter-sized exoplanet that orbits very close to its star.
C) A reference to the fact that, unlike Earth, Jupiter gives off heat.
D) Any gas giant planet where fusion takes place. - correct answer ✔B) The name given to a Jupiter-
sized exoplanet that orbits very close to its star.
According to Kepler's 3rd Law, which of the following influences the time it takes a planet to orbit the
Sun?
A) Its mass
B) Its density
C) Its orbital radius
D) Its spin rate - correct answer ✔C) Its orbital radius
Why do Mercury and Venus spin so slowly?
A) Because they have no moons
B) Because of gravitational interactions with other planets
C) They are close to being tidally locked by the Sun.
D) All the above - correct answer ✔C) They are close to being tidally locked by the Sun.
,Which type of nebula is comprised of hot hydrogen ions (H+) and glow?
A) Emission nebula
B) Molecular clouds
C) Dark nebula
D) All the above - correct answer ✔A) Emission nebula
What do planetary nebulae have to do with planets?
A) Planets form from them
B) They are made from the destruction of planets
C) They are similar to gas giants
D) Nothing - correct answer ✔D) Nothing
What do supernovas do that fusion in the cores of stars cannot?
A) Create the heaviest elements in the universe
B) Create heat and light
C) Create iron
D) All the above - correct answer ✔A) Create the heaviest elements in the universe
Which is a possible consequences of the future flyby of the star Gliese 710?
A) Showers of comets will head into the inner Solar System from the Oort Cloud.
B) The orbits of the planets will be significantly altered.
, C) Several dwarf planets from the Kuiper Belt will be kicked out of the Solar System.
D) All the above - correct answer ✔A) Showers of comets will head into the inner Solar System from the
Oort Cloud.
Where is the easiest place to find meteorites (if you can get there)?
A) Antarctica
B) Australia
C) Sahara Desert
D) Northern Canada - correct answer ✔A) Antarctica
What is an astronomical unit (AU)?
A) The time it takes late to travel from the Sun to the Earth
B) The distance from the Sun to the Earth
C) The mass of the Sun
D) The distance that light travels in one second - correct answer ✔B) The distance from the Sun to the
Earth
What is the force that enable dust particles to accrete to each other?
A) Gravitational forces
B) Magnetism
C) Electrostatic attraction
D) Radiation - correct answer ✔C) Electrostatic attraction
