0° longitude on Mars is defined by: The line which runs across the equator of th
ID: 289691 • Letter: 0
Question
0° longitude on Mars is defined by:
The line which runs across the equator of the planet
The position of the circular Crater Davies
The position of Olympus Mons, the highest point on Mars
The position of Hellas Basin, the lowest point on Mars
The northern pole of the planet
A point in Elysium Planitia, the point of zero elevation (“sea level”) on the planet
The line which runs across the equator of the planet
The position of the circular Crater Davies
The position of Olympus Mons, the highest point on Mars
The position of Hellas Basin, the lowest point on Mars
The northern pole of the planet
A point in Elysium Planitia, the point of zero elevation (“sea level”) on the planet
Explanation / Answer
Answer: The position of the circular Crater Davies
When Mariner 9 mapped the planet at about 1 kilometer (0.62 mile) resolution in 1972, an extensive control net of locations was computed by Merton Davies of the RAND Corporation. Davies designated a 0.5-kilometer wide crater (0.3 miles wide), subsequently named 'Airy-0' (within the large crater Airy in Sinus Meridiani) as the longitude zero point on mars.
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