Most conversations about space and the solar system overlook Earth. Nonetheless, since humans live there and Earth is a planet like any other, we know a lot about it. Two thirds of the surface of the Earth is covered with water, with high peaks and deserts making up the remaining third. That is the standard of living for people on Earth.
There are an estimated 1.75 million other species on Earth, and new ones are uncovered annually (some scientists estimate that there are more than 100 million species on Earth overall, including bushes, bugs, beetles, and bats). In addition to oxygen, which humans require to breathe, the Earth's atmosphere is also rich in carbon dioxide, which is necessary for plants. In addition, it blocks the sun's harmful rays and allows light to pass through, warming us and brightening the sky.
So far, Earth is the only planet that has confirmed its existence. Most scientists think that it has water, and its climate is not too cold or hot.
At the same time, many scientists think that somewhere, maybe there are planets that have the conditions for life to exist in other galaxies. The universe is much bigger and wider than we can imagine, so there might be another life somewhere in it! You may be surprised, but the Earth is actually not completely round. The length of the Earth when viewed vertically from the North Pole to the South Pole is shorter than that of the equator. In other words, the Earth's horizontal length is a little bit longer than vertical. So to speak, it's like a ball that is slightly pressed from above?
Copernicus solved a difficult mystery in astronomy by discovering that the Earth orbits the Sun in a perfect circle. But much later, astronomers discovered that the Earth does not rotate in perfect circles, as Copernicus said.
Tycho Brahe was a 16th-century Danish astronomer. Like many astronomers at the time, he also believed that the sun revolved around the earth. However, his assistant Johannes Kepler, used Brahei's findings to find that the earth orbits the sun in an elliptical orbit.
An ellipse is a slightly elongated circle, not a perfectly round one. His research has helped a lot in making people believe Copernicus was right.
characteristics of the earth
Diameter: 12,756 km
Length of the day (biological cycle): 23 hours and 56 minutes
Length of one year (common cycle): 365.26 days
Satellite: 1
Surface temperature: -70C to 55C