Trivia

Hard

Which Letter Appears Once a Year on the Moon’s Surface?

J
X
Y
H

Answer: X

The human mind is a pattern seeking one.  We humans are quite good at turning abstract shapes into familiar ones.  One of the most famous astronomical examples of this is the Man in the Moon–from our terrestrial vantage point the craters on the Moon’s surface look like a man’s face looking down on us.

If you look even closer at the Moon, however, you will find a much tinier surface feature just waiting for us to visualize a symbol over it.  For a scarce four hours at the beginning of the first quarter, the horizon of the Moon is illuminated by the Sun in just such a way that the walls of the lunar craters La Caille, Banchinus, and Purbach cast shadows that create the illusion of a giant X on the surface of the Moon. This formation is known as the Purbach Cross (thanks to the related crater) or the Werner X (named so after the Werner crater, a sizable landmark just south of the X formation).

Bonus Trivia: Formations like the Purbach Cross are known as clair-obscur formations, or light-dark formations, created by extreme contrast between natural light (in this case the sun) and darkness (the deep darkness of the dark side of the Moon and the Moon’s craters).

Trivia

Hard

Collaboration Between Legendary Performers Michael Jackson And Freddie Mercury Was Thwarted By?

Trivia

Hard

What Product Was The First To Be Advertised Into Deep Space?

Trivia

Hard

Which Tech Company’s Name Means “Three Oceans”?

Trivia

Very Hard

The Highest Grossing James Bond Film, Adjusted For Inflation, Is?

Trivia

Hard

Clint Eastwood, Best Known For His Cowboy Roles, Got Into Film By Portraying A?

Trivia

Easy

Which Of These Banana Cultivars Constitutes The Bulk Of Global Banana Consumption?

Trivia

Hard

Which Musician Has Made Multiple Cameos On Star Trek?

Trivia

Hard

Photo Lab Printers Are Calibrated Using A Tool Known As A?

Trivia

Very Hard

Before The Term Coffin Came To Be Synonymous With Burial Casket, It Referred To?

Trivia

Hard

The Magnavox Odyssey Came With What To Enhance Early Video Game Play?