Our Planet Earth is such an extraordinary creation that even after years and years of research, there always is something that remains unanswered.
The place we call home, Planet Earth is actually such a mystical and magical place that we never actually appreciate what it offers. It is a big mystery waiting to be solved and what we know right now is basically only a little part of actual facts. Yet there are so many facts that are overlooked. Here are few such facts that are lesser known:
- Earth’s Shape
There have been enough discussions and debates about this. While some still maintain that Earth is flat, earth isn’t perfectly round either. Centrifugal force which is the force that arises from an object’s passiveness and appears to act on a body that is moving in circular path pushes the force outwards exactly at Earth’s equator, thus giving it a slight bulging waistline. Hence it isn’t even a sphere but more of tomato like shaped.
- About the name
The name Earth has been inspired from Anglo-Saxon word Erda which actually means “soil” or “ground”. Every other planet in the solar system has been named after a Roman God or a Greek God. However the irony is that 71% of the planet is water covered. It is estimated that the Earth is approximately 4.56 billion years old.
- Pale Blue Dot
While we may feel that our planet is a huge one, it actually is just another tiny little dot in the Universe. The furthest photo of Earth has been taken from the distance of 3.7 Billion miles and is labelled as “Pale Blue Dot”.
- The Densest Planet
Earth is the densest and the rockiest planet in the solar system. This is also why Earth has the highest surface gravity amongst all planets. There are plenty of heavy elements deposits such as uranium and lead present in Earth’s makeup which gives it such high density. The average density of Earth is estimated to be 5.52 grams/cubic centimeter. Also the density varies according to different parts of planet. For instance, earth’s metallic nickel-iron core is denser when compared to the crust.
- Ocean holds gold in abundance
Scientists have found that ocean holds approximately 20 million tons of gold and most of it is diluted. Research has found that each liter of seawater consists of 13 billionth of a gram of gold. There is so much undissolved gold on sea floor that every person can get about 9 pounds.
- Man-made objects that orbit Earth
Presently there are over 100,000 man-made objects orbiting Earth. Majority of these objects are junk like small pieces of old spacecrafts, inactive satellites and such while others are satellites for commercial and military usage. NASA estimated that on an average atleast one piece of these space junk returns to earth every single day.
- Earth’s Twin Planet
It is believed that Earth once had a twin planet that the scientists have named Theia. They say that the planet was Mars-sized and was at 60 degrees either front or behind Earth. Around 4.533 billion years back, Earth and Theia crashed into each other. While most of the planet was absorbed, a chunk remained and hence Moon was created. This theory is believed to be true because Moon contains some metallic isotyoes that are very similar to Earth and is also quite large for a planet of our size.