Mars
This is the smoother hemisphere of Mars.
What is the Northern Hemisphere?
This space craft flew by Mercury in 1873.
What is the Mariner 10
One orbit of Mercury lasts this many Earth days.
What is 88?
Due to an impact early in its life Mercury's rotation is described as this.
What is Retrograde?
This word can be used to describe aliens from Venus.
These are the two moons of Mars.
What are Phobos and Deimos?
This spacecraft was almost considered a failed mission due to massive dust storms.
What is Mariner 9?
What is longer on Venus, a Solar day or a Sidereal Day?
What is Sidereal?
This is the largest surface feature of Mercury.
What is the Caloris Basin?
The two continents of Venus are called this.
What is Ishtar and Aphrodite?
The lack of this important feature is what makes Olympus Mons the tallest mountain in the solar system.
What is tectonic plates?
This spacecraft is currently in route to Mercury.
What is BepiColumbo?
This is the length of a Venusian sidereal day in Earth Days.
What is 117?
This is the relationship between rotation and orbits on Mercury.
3 rotations for every 2 orbits
These bubbles form on the boiling surface of Venus.
What are lava domes?
This is the largest feature on the Martian surface.
What is the Tharsis Bulge?
The Russians landed this probe on Venus.
What is Venera?
In hours, what is the length of time of one Martian Day.
What is 24.6?
These "stretch marks" on Mercury's surface are called rupes or this.
What is scarps?
These spiderwebbing cracks form on the surface of Venus as lava erupts.
What are arachnoids?
Daily Double
This is the largest crater on Mars.
Messenger is an acronym for this.
What is Mercury Surface Space Environment Geochemistry and Ranging?
In earth days, this is the length of one Martian year.
What is 687?
What is Ice?
Rain on Venus is made of this.
What is Sulfuric Acid?