Earth….Did You Know?

By  | October 27, 2018 | Filed under: Interesting Facts, News

figure20 The Earth is a sphere, but due to its gravitational forces it is not a perfect circle. In fact, there is a bulge around the equator because of this. The Earth’s Polar radius is 3,949.99 miles, while its Equatorial radius is 3,963.34 miles.  So Mother Earth suffers with battle of the bulge …. just like her earthings….for the most part.

Now more earth factoids …just so you know:

Every other planet in our solar system is named after a Greek or Roman God, except our planet. The word Earth comes from the Anglo-Saxon word Erda, which means “ground” or “soil” and is thought to be 1,000 years old. Ironically, the planet is covered by 71% water…the only planet we know of in the entire universe to have this precious fluid in liquid form.

People often claim there aren’t enough hours in the day and they’re right… not even 24. That’s right, the actual time it takes the planet to rotate on its axis is 23 hours 56 minutes and 4 seconds. This is what’s called a sidereal day. The solar day, the time it takes for the sun to return to the same spot on the meridian, varies as much as 16 minutes throughout the year, due to the position in its orbit.

Scientists believe the Earth is made up of 7 major plates of “crust,” which move in different directions up to 4 inches per year. When they crash into each other, the theory goes, mountains are born; where they pull apart we have valleys. On the scary side these also cause earthquakes and volcanoes. The good news is that all this activity allows for carbon…essential to our very existence…to be recycled and replenished, allowing life as we know it to continue.

Scientists now believe that we were once not alone in our orbit around the Sun… we had a “twin” planet we call Theia, which was the size of Mars and was 60 degrees either in front or behind our Big Blue Ball. One afternoon about 4.533 billion years ago, Theia crashed into the Earth; most of the planet was absorbed, but a large chunk blew off and combined with materials from our planet to create the Moon. Why do we think this? It’s because our Moon is unusually large for a planet of our size and has metallic isotopes similar to those on Earth.

So we have been to the Moon and to Mars, but guess what? We have barely begun to visit the depth of our vast oceans. In fact, less than 10% of the deep blue seas have been explored. The ocean contains 97% of our water and 99% of the living area. While we have identified 212,906 marine species, there are possibly 25 million more that we do not know about. Suddenly, the Loch Ness Monster doesn’t seem so far-fetched.

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