Earth
Symbols of the Planets
In our long history of staring up at the stars, human beings have assigned various qualities, names, and symbols for…
Orbits of the Planets
[/caption] Centuries ago, people believed that the Earth was the center of the Solar System. Slowly, that view was replaced…
What are the Sizes of the Planets?
It is often difficult to grasp just how large the planets actually are. There are a number of ways to…
Weight on Other Planets
[/caption] Many children, and even adults, dream of visiting other planets and wonder what it would be like to stand…
Discovery of the Planets
[/caption] We actually only know the exact date of when a few of the planets were discovered. Five of the…
Names of the Planets
[/caption] You may recognize the names of the planets from your high school literature course or a history class. That…
Continental Drift Theory
In elementary school, every teacher had one of those pull-down maps of the world to teach geography. On occasion, I…
Yellowstone Eruption
[/caption] Millions of people visit Yellowstone National Park every year, but how many think about the fact that they're standing…
Circumference of the Earth
The circumference of the Earth in kilometers is 40,075 km, and the circumference of the Earth in miles is 24,901.…
Albedo of the Earth
The albedo of the Earth is 0.367. That's the simple answer, now here's the more complex one. Astronomers use the…