The Milky Way Rotates About Its Center Once Every 200

question 26

True/False

The Milky Way rotates about its center once every 200 million years, so in the 4.6-billion-year history of the Earth, we have completed 23 rotations.

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Definitions:

Double Bonds

Chemical bonds between two chemical elements involving four bonding electrons instead of the usual two.

Acetylene

A colorless, highly flammable gas, C2H2, used as a fuel and a building block for synthetic materials; it’s the simplest alkyne.

Methanol

A light, volatile, colorless liquid alcohol, CH₃OH, used as a solvent, antifreeze, fuel, and as a starting material for chemical synthesis.

Single Bonds

Chemical bonds involving the sharing of one pair of valence electrons between two atoms, typically indicative of a stable chemical linkage.