Trivia

Hard

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

H
X
J
Y

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

Which Sci-Fi Movie Swept The Razzie Awards?

Trivia

Hard

Spaceship Earth, The Iconic Disney World Epcot Attraction, Was Designed By Which Sci-Fi Writer?

Trivia

Hard

The Highest Flying Bird In The World Is A Type Of?

Trivia

Very Hard

Frankenstein Author Mary Shelley Carried Which Of These Mementos From Her Deceased Husband?

Trivia

Easy

The Acid Mixture “Aqua Regia” Derives Its Name From The Ability To Dissolve?

Trivia

Very Hard

The Sentence “Where You At?” Is An Example Of A?

Trivia

Hard

Actor James Doohan Was Awarded An Honorary Degree In?

Trivia

Easy

What Caused 7 Million Americans To Disappear In The 1980s?

Trivia

Hard

Which U.S. State Wasn’t Technically A State Until 2012?

Trivia

Hard

The Largest National Park In The World Is Located In Which Country?