Solar System Astronomy Flashcards
6 cards from real ASP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Solar System Astronomy flashcards as text
What are the four terrestrial planets in our solar system?
Answer: Mercury, Venus, Earth, Mars
The four terrestrial (rocky) planets are Mercury, Venus, Earth, and Mars, all of which are composed primarily of silicate rock and metals.
What is the difference between a meteor, meteoroid, and meteorite?
Answer: Meteoroid is in space, meteor is in Earth's atmosphere, meteorite reaches the ground
A meteoroid is a small rocky body in space, a meteor is the visible streak of light when it enters Earth's atmosphere, and a meteorite is any portion that survives to reach Earth's surface.
What is the term for the point in a planet's orbit when it is closest to the Sun?
Answer: Perihelion
Perihelion is the point in a planet's elliptical orbit when it is closest to the Sun, while aphelion is when it is farthest from the Sun.
Which gas gives Neptune and Uranus their blue-green color?
Answer: Methane
Methane in the atmospheres of Neptune and Uranus absorbs red light and reflects blue-green light, giving these ice giants their distinctive blue-green colors.
What is the Kuiper Belt?
Answer: A region of icy bodies beyond Neptune's orbit
The Kuiper Belt is a region of the outer solar system extending from Neptune's orbit (30 AU) to about 50 AU, populated by icy bodies including dwarf planets like Pluto.
What is the Jovian moon Europa significant for in astrobiology?
Answer: It may harbor a liquid water ocean beneath its icy surface
Europa is considered a prime candidate for extraterrestrial life because tidal heating from Jupiter may maintain a liquid saltwater ocean beneath its frozen icy crust.