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Are Lunatics playing a celestial game
of Tic-Tac-Toe?
The "X" near the center of this image
is called "Lunar X," a feature on the Moon formed by the
adjoining walls of three craters (all mostly in shadow here,
to the left, right, and above the X). Lunar X is only
visible as a clearly defined X for a few hours of its lunar
twilight when sunlight grazes the tops of the crater wall
rims.
Lunar X is located at lunar
coordinates 25.3° S latitude and 0.9° E longitude, and is
about 70 kilometers across. |
