Trivia

Hard

The Densest Planet In Our Solar System Is?

Neptune
Venus
Mars
Earth

Answer: Earth

Our solar system can be divided, when talking about planet density, pretty neatly along the Mars/Jupiter dividing line. Mercury, Venus, Earth, and Mars are in a planetary class known as terrestrial. They’re composed of silicate rocks and/or metals, have a solid surface, and while their general density varies a bit as you move away from the core, it is pretty consistent overall.

Among the inner terrestrial planets, Earth is the densest planet by a somewhat narrow margin. The size of Earth combined with the mass of the iron/nickel core, the molten silicate upper and lower mantle, and the dense crust, yields an overall density of 5.514 g/cm3–our closest competitor in the density Olympics is Mercury with a density of 5.427 g/cm3 , followed by Venus (5.243 g/cm3), with Mars trailing in a distant fourth (3.933 g/cm3).

By contrast, the four outer planets, Jupiter, Saturn, Uranus, and Neptune, are classified as gas and/or ice giants and are characterized by greater size, mass, and a much lower (and wide ranging) density than the inner planets. Despite having significantly bigger volume than the inner planets, the giants have extremely low density. The densest outer planet is Neptune with a mean density of 1.638 g/cm3. Jupiter, despite its size, still manages to hold down a bit of weight and has a density of 1.326 g/cm3. Uranus is in third place at 1.27 g/cm3. So light and airy it might as well be cotton candy, the last giant, Saturn, has a density of 0.687 g/cm3. Saturn’s density, you might note, is lower than that of water–if you could find an enormous intergalactic lake to throw it into, it would float like a beach ball.

Trivia

Easy

Which Action Movie Star Won An Emmy For His Guest Appearance On The TV Show Friends?

Trivia

Hard

The Skinny Tie Entered American Culture As A Result Of?

Trivia

Hard

Which Of These Christmas Films Was Originally Released In The Spring?

Trivia

Hard

What Was The Name Of Apple’s Failed Game Console?

Trivia

Easy

Which Nuts Are Actually Beans?

Trivia

Hard

The Most Efficient Swimmer In The Animal Kingdom Is?

Trivia

Easy

Which Of These Animals Was Originally Known As The “River Horse”?

Trivia

Easy

If Alexander Graham Bell Had His Way, We’d Start Telephone Conversations With What?

Trivia

Hard

The Belief Electric Fans Cause “Fan Death” Is A Persistent Urban Legend In?

Trivia

Easy

“Silverbacks” Are Not A Distinct Species Of Gorilla, The Name Is A Designation Of?