GENERAL KNOWLEDGE

GK

SOLAR SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
One year on Mercury is about 88 Earth days. This means that is takes 88 Earth days for Mercury to ____
A
travel in orbit around its moon
B
complete one rotation
C
switch orbits with the nearest planets
D
make one complete orbit around the sun
Explanation: 

Detailed explanation-1: -Compared to its orbital period of 88 days, this means that Mercury has a spin-orbit resonance of 3:2, which means that the planet makes three completes rotations on its axis for every two orbits it makes around the Sun.

Detailed explanation-2: -It speeds around the Sun every 88 days, traveling through space at nearly 29 miles (47 kilometers) per second, faster than any other planet. Mercury spins slowly on its axis and completes one rotation every 59 Earth days.

Detailed explanation-3: -Mercury orbits the sun once every 88 Earth days. So one year on Mercury is 88 Earth days. But a day on Mercury is longer than an Earth day. One Mercury day lasts for 59 Earth days.

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