What is Earth?
Earth is the third planet from our sun and is the only planet we know that is currently sustaining life. In this article, we will be discussing about how Earth manages to sustain life, how it is involved in some of our instruments (tools, not musical), and other things about Earth. Pretty much everything in this article is theorized since we still haven't confirmed the origin of life on this planet.
How did the Earth come to be?
It is theorized that when our sun was born, it's gravitational pull caused large (very large) amounts of dust to begin to orbit it. Because of all objects having their own gravitational field, that dust began to gather into asteroids and those asteroids began to gather up and form the planets we have today.
How did life form?
Earth has multiple properties that allow it to sustain life. It is theorized that Earth was originally a very volcanic planet. Meteor that were pulled by Earth's gravitational pull are theorized to have brought life to Earth. This is all according to scientific research and theories based on that research.
Where did the oceans come from?
Research shows that the water here on Earth came from comets that landed here that were carrying ice. That ice melted and formed the oceans and seas we have today. That water is now pretty much everywhere on Earth thanks to the water cycle.
How did the Earth have the atmosphere it has today?
It is theorized that microorganisms created the oxygen we have today through photosynthesis. We believe that long ago, volcanic activity created large amounts of carbon dioxide and other harmful gasses in the atmosphere. The microorganisms that performed that photosynthesis is called cyanobacteria; it is a certain kind of algae.
How does the Earth interact with the functionality of our tools?
The Earth allows multiple machines we have today to work. Earth's magnetic field is what compasses are pointed at. The gravitational field of our planet is what allows the use of gyroscopes and the attitude indicators on aircraft. The air pressure of the atmosphere allows us to predict the weather using a barometer. The gravitational field of the Earth holds the atmosphere we have which is needed to allow airfoils to be usable on aircraft.
Conclusion.
It took many convenient circumstances for this planet to be the only known planet in our solar system to be suitable for life. The formation of our planet being the proper distance from the sun, the chance of meteors bringing organic life to this world, the great luck that those comets brought ice to Earth, the unbelievable fortune we had when that cyanobacteria just happened to be the perfect organisms to create oxygen, the possibly practically impossible probability (I'm running out of ways to say "might not happen again") that all those events that made Earth what it is today will happen again. Who knows if there could be any other world that can sustain life in the same way Earth does (like Homestead II from the movie Passengers (2016)).
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