Earth is the biggest of the terrestrial planets and the third planet from the Sun. Earth is the only planet in our solar system that has not been named after a Greek or Roman god. The Earth formed 4.54 billion years ago and is the only planet known to contain life.
Here are 10 must-Known Facts About Our Home Planet;
1. Earth was previously thought to be the center of the cosmos
Because of the apparent motions of the Sun and planets in respect to their point of view, ancient astronomers insisted that the Earth remained static while other celestial bodies moved in circular orbits around it. Copernicus eventually theorized that the Sun was at the center of the cosmos, which is equally incorrect. Earth was previously thought to be the center of the cosmos and is one of the Known Facts About Our Home Planet
2. The Earth has been in existence for 4.5 billion years
What evidence do we have? Scientists examine rock and sediment to estimate the age of that piece of sediment in order to establish the age of the Earth. However, it is not as simple as one may expect. The Earth has been in existence for 4.5 billion years and is one of the Known Facts About Our Home Planet
Plate tectonic processes imply that the Earth is continually recycling its rock, breaking it down into magma in the interior and pushing it back up to the surface. The oldest rock discovered came from Australia and serves as the foundation for scientists’ estimates of Earth’s age. That’s a lot of birthday cake at 4.5 billion years old!
3. The planet Earth has only one natural satellite
The Moon is our solar system’s greatest satellite in terms of proportion of the size of the body it orbits. However, it is just the seventh largest natural satellite in terms of size. The planet Earth has only one natural satellite and is one of the Known Facts About Our Home Planet
4. Earth is the only planet that has not been named after a god
Our solar system’s other seven planets are all named after Roman gods or goddesses. Although only Mercury, Venus, Mars, Jupiter, and Saturn were called in ancient times since they were visible to the human eye, the Roman system of naming planets was continued until Uranus and Neptune were discovered. Earth is the only planet that has not been named after a god and is one of the Known Facts About Our Home Planet
5. Earth is largely made up of iron, oxygen, and silicon
If you could split the Earth’s stuff into heaps, you’d obtain 32.1 percent iron, 30.1 percent oxygen, 15.1 percent silicon, and 13.9 percent magnesium. In fact, the majority of this iron is located deep below the Earth’s core.
If you could truly reach down to the core and sample it, it would be 88 percent iron. Oxygen makes about 47 percent of the Earth’s crust. Earth is largely made up of iron, oxygen, and silicon and is one of the Known Facts About Our Home Planet
6. Water covers 70 percent of the Earth’s surface
When astronauts first entered space, they returned to Earth with human eyes for the first time and dubbed our planet the Blue Planet. It’s not surprising. Oceans encompass 70% of our planet’s surface. The remaining 30% is solid terrain that rises above sea level. Water covers 70 percent of the Earth’s surface and is one of the Known Facts About Our Home Planet
7. Earth doesn’t take 24 hours to rotate on its axis
It is, in fact, 23 hours, 56 minutes, and 4 seconds. This is the time it takes for the Earth to circle entirely around its axis; astronomers refer to this as a sidereal day. Wait a minute, it means a day is 4 minutes shorter than we thought. You’d imagine that as time passed, day by day, the day would become night and night would become day. Earth doesn’t take 24 hours to rotate on its axis and is one of the Known Facts About Our Home Planet
8. Earth is recycled
You’re walking on recycled earth. The Earth’s rock cycle changes igneous rocks into sedimentary rocks, then metamorphic rocks, and so on. The cycle isn’t a complete circle, but the fundamentals function as follows: Magma arises from deep inside the Earth and solidifies into rock (this is the igneous component). That rock is uplifted to the surface by tectonic processes, where erosion shaves sections off. Earth is recycled and is one of the Known Facts About Our Home Planet
These microscopic pieces are deposited and buried, while pressure from above compacts them into sedimentary rocks like sandstone. According to Dorling Kindersley, if sedimentary rocks are buried any deeper, they “cook” into metamorphic rocks under high pressure and heat. Of course, sedimentary rocks may be re-eroded and metamorphic rocks can be re-uplifted along the process. But if metamorphic rocks get caught in a subduction zone where one piece of crust is pushing under another, they may find themselves transformed back into magma.
9. The hottest spot on earth is Libya
According to NASA Earth Observatory, the hottest point on Earth is El Azizia, Libya, where temperature records from meteorological stations show it reached 136 degrees Fahrenheit (57.8 degrees Celsius) on September 13, 1922. (opens in new tab). There were probably hotter places outside of the network of weather stations. The hottest spot on earth is Libya and is one of the Known Facts About Our Home Planet
10. Earth Used to be Purple
According to this Live Science article, ancient bacteria may have harnessed the sun’s rays using a chemical different than chlorophyll, one that gave the creatures a violet color. According to the article, chlorophyll evolved after another light-sensitive chemical known as retinal was already present on early Earth. Earth Used to be Purple and is one of the Known Facts About Our Home Planet
Retinal, which is now identified in the plum-colored membrane of a photosynthetic bacterium called halobacteria, absorbs green light and reflects back red and violet light, which appears purple when combined. The theory might explain why, despite the fact that the sun transmits the majority of its energy in the green section of the visible spectrum, chlorophyll absorbs mostly blue and red wavelengths.