Earth and the Moon
The number of layers in Earth's interior
What is three layers?
The compound in Venus's atmosphere that makes the planet appear yellow
What is sulfuric acid?
The fraction of Saturn's atmosphere helium comprises
What is 7%?
The first space probe to visit Uranus
What is Voyager 2?
The largest known asteroid
What is Ceres?
The FURTHEST layer of Earth's atmosphere from the surface
What is thermosphere?
The largest crater on Mercury
What is Caloris Basin?
The space probe that made a descent through Jupiter's atmosphere in the 1990s
What is Galileo?
The second-largest moon of Neptune
What is Proteus?
The meaning of the Latin word cometa
What is "long-haired"?
The scientist who mistakenly thought he observed oceans on the Moon in 1609.
What is Galileo Galilei?
The names of Mars's two moons
What is Phobos and Deimos?
The Jovian moon with the highest reflectivity
What is Europa?
The astronomer that discovered Uranus
What is William Herschel?
The common point in the sky where a meteor shower appears to originate
What is radiant?
The mare basin Neil Armstrong and Edwin Aldrin landed on
What is the Sea of Tranquility?
The basin that contains the lowest point on Mars
What is Hellas Planitia?
The width (in miles) of Saturn's brightest rings
What is 175,000 miles?
The event that took place in the same year during Voyager 2's flyby of Neptune
What is the fall of the Berlin Wall?
The space probe that successfully landed on a comet in 2014
What is Rosetta?
The largest maria
What is Mare Imbrium?
The year Mars's two moons were discovered
What is 1877?
The ring the two moons Prometheus and Pandora orbit near
What is F ring?
The largest moon of Uranus discovered from space probe data in the 1980s
What is Puck?
The person who proposed the dirty snowball model of comets?
What is Fred Whipple?