Trivia

Hard

Which Moon Orbits Closest To Its Host Planet?

Europa
Titan
Phobos
Earth's Moon

Answer: Phobos

Among moons in our solar system, Phobos, the largest and most innermost of Mars’ two moons, is quite a curiosity. Phobos orbits just a scant 3,700 miles above the surface of Mars; for comparison, Earth’s moon has an average distance of 239,228 miles from Earth (or nearly 65 times the distance between Phobos and Mars).

The tiny distance between Mars and its largest moon would be more than enough to make it noteworthy, but the close distance creates all sorts of equally as noteworthy elements in the Martian/lunar relationship. Because Phobos is so close to Mars, it actually orbits the red planet faster than the planet itself rotates, such that Mars experiences two moon rises and sets per day.

Further, mathematical models suggest that, based on the fact that Phobos is quietly drifting closer to Mars by two meters every century, within 30-50 million years the moon will either smash into Mars or break apart and create a planetary ring like a smaller version of those seen around Saturn.

Trivia

Easy

What Animal Is, Relative To Its Size, The Fastest Runner On Earth?

Trivia

Easy

The Largest Sea Plane Ever Built Was The?

Trivia

Easy

British Researchers Created A Novel Water Quality Sampling Technique Using What Common Item?

Trivia

Very Hard

Best Known For Jeans And Fashion, Which Of These Companies Now Has Significant Real Estate Holdings?

Trivia

Very Hard

Which Video Game Had The Highest Per-Copy Cost?

Trivia

Hard

What Company Lobbied For A 7.5 Cent Coin?

Trivia

Easy

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Trivia

Hard

Ben Franklin Wasn’t Just A U.S. Founding Father, But The Founder Of Modern?

Trivia

Very Hard

The First Console Role-Playing Game Was?

Trivia

Hard

Which Of These Caterpillars, Found Throughout The Southeastern U.S., Is Covered In Stinging Hairs?