When were the planets discovered?
Mercury, Mars, Venus, Jupiter, and Saturn were known from ancient times.
Uranus was discovered in 1781, Neptune in 1846, and Pluto in 1930.
Similar Posts
How many stars can you see on a clear night?
At any given time on a clear night in a dark place with no obstructions on the horizon, 2,500 stars are visible to the naked eye.
Do American women still earn less money than American men?
Yes folks, American women still earn less money than American men. In 1988, the median weekly earnings of full-time female workers in all occupations were 70.2 percent of male workers’ earnings.
Is typhoid fever the same thing as typhus?
No, typhoid fever is not the same thing as typhus. Typhus is caused by microbes called rickettsiae and is carried by fleas, mites, and ticks, which in turn are carried by rats and other rodents. Typhoid (also called typhoid fever or enteric fever) resembles typhus in its symptoms but is caused by a different microbe,…
What’s the difference between a stalagmite and a stalactite?
Both stalagmites and a stalactites are elongated deposits of minerals at points where slowly dripping water enters a void. Stalagmites build from the bottom of such a cavity; stalactites hang from the ceiling. When the same dripwater source creates both a stalactite and a stalagmite, the two may meet and form a column.
How much of America drinks fluoridated water?
As of 1990, 53 percent of Americans drink fluoridated water. Of these, 121 million drink artificially fluoridated water; 9 million drink water from naturally fluoridated sources.
How thick is the crust of the earth?
Sometimes likened to the shell that covers an egg, the layer of rock or crust that covers the surface of the earth is, on average, 22 miles thick.