Who among us does not know the planet Earth, of course everyone knows how not, and it is the planet in which we live, but do you think that you know all the information about planet Earth?... Here are the most important facts that you did not know about planet Earth.
Earth's gravity is not uniform
If the Earth is in reality a perfect ball, then the gravity in that case will be the same. It will not differ from one location to another on the Earth's surface, but the Earth's surface is very rugged, and the flow of water and the movement of tectonic plates that occur under the Earth's crust in addition to the erosion of ice, all of these Objects directly affect the change in the force of gravity.
These differences are known as gravitational anomalies. High-altitude mountain ranges such as the Himalayas cause a large difference in gravity, meaning that gravity is stronger on a smooth, flat surface. On the contrary, the presence of slopes and other elevations causes anomalies in gravity.
NASA's GRACE (Gravity Recovery and Climate Experiment) mission, orbiting above us, is mapping Earth's gravitational field in unprecedented detail.
The Earth is not flat, but at the same time it is not completely round
The Earth was never perfectly round. The planet bulges around the equator by an additional 0.3% due to the fact that it rotates on its axis. Qatar The Earth from the North Pole to the South Pole is approximately 12,714 kilometers (7,900 miles), while its diameter across the equator is 12,756 kilometers (7,926 miles). The difference is 42.78 kilometers (26.58 miles) - about 1/300 of the Earth's diameter. This difference is so small that we cannot see it in pictures of Earth from space or with the naked eye, so the planet appears round to the human eye.
Recent research from NASA's Jet Propulsion Laboratory indicates that the melting of glaciers is a major cause of the spread of the Earth's ocean.
Today is not 24 hours
The length of Earth Day is increasing. When Earth formed 4.6 billion years ago, a day spanned only about six hours. 620 million years ago, but this rose to 21.9 hours. Today's average day is 24 hours long, but it's increasing by about 1.7 milliseconds every century.
Yes, you are now asking why?
The Moon slows the Earth's rotation during the tidal process, which helps create it. The Earth's rotation causes the position of the tidal ocean bulges to pull slightly in front of the Earth-Moon axis, creating a force that slows the Earth's rotation. As a result, our days are getting longer – but not nearly enough to make the big difference we notice in our daily lives.
There weren't always so many continents
The continents of the Earth have a recurring relationship through time, those relationships were intermittent, they lasted for millions of years. About 800 million years ago, the great landmass tectonic plates came together on Earth, uniting the continents but they were all formed into a large supercontinent called Rodinia. Rodinia eventually split into many pieces that collided again 250-500 million years ago, creating the Appalachian Mountains of North America and other important mountain ranges such as the Urals in Russia and the mountains of Kazakhstan.
About 250 million years ago, the continents came together again to form another supercontinent called Pangea, surrounded by only one ocean. After another fifty million years, Pangea began to disintegrate. It also split into two large land masses - Gondwanaland and Laurasia - which eventually split into the continents we know today.
The driest place on earth
The driest place in the world is the Atacama Desert in northern Chile - next to the world's largest body of water, the Pacific Ocean. The average annual precipitation in Arica, Chile, is only 0.8 millimeters (0.03 in). It is also believed that the city of Calama in Atacama had not experienced any rain for as long as 400 years until a sudden storm fell in 1972. Unlike most deserts, the Atacama is relatively cold, and in its most arid parts also, it does not host even cyanobacteria.
Cyanobacteria: These are green photosynthetic microorganisms that live in rocks or under stones.
NASA astrobiologists are traveling to the Atacama to search for microorganisms that live in such a harsh environment, hoping to learn how life exists on other planets by studying how they adapt to those conditions.
Sea levels were very different
The most recent advance of ice on the planet began about 70,000 years ago, ended 11,500 years ago and reached its furthest extent 18,000 years ago. During this period, glaciers and ice sheets cut off the basins of the Great Lakes and almost completely blocked rivers, diverting the course of the Mississippi River and other important rivers in the United States, as much of the water was inked like ice, lowering sea levels by not much. A little up to 120 metres. That's roughly (390 feet), showing parts of what is now the ocean floor.
The sea level has also risen in the past to 70 meters (230 feet). During the last glacial period, the sea was actually 5 to 7 meters (16 to 23 feet) higher than it is today.
Earth's Ice Ages
Approximately 600-800 million years ago, the Earth underwent many major climatic changes known as ice ages. The climate also became so cold that some scientists believe that the Earth froze almost or completely completely several times; This is known as the "snowball earth" theory.
As a result of the scientists' study, there may have been four periods of this type of freezing and thawing, which resulted from the decrease of important gases classified as greenhouse gases such as methane, carbon dioxide, etc., during which the Earth could be covered with ice from pole to pole.
Most of the Sun's energy would be reflected back into space by the ice. The average temperature of the planet would have been around -50°C (-74°F), and the equator is today much closer to Antarctica. If a snowball was already on Earth, fortunately we would not have been alive at this time to feel that cold, as there were only microscopic and simple organisms at that time.
Our sun has a life cycle
All the stars you know and you also don't know, like our sun, age, and who do you eventually die. When the Sun depletes its large stock of hydrogen, it will collapse under the influence of gravity, eventually swelling into a red giant star 100 times larger and 2,000 times brighter, enough to vaporize the Earth.
Before you worry, this won't happen for about five billion years.
One option is to leave the planet before that happens, but that would require hitherto unimagined technology and a habitable destination. Another possibility is that over the next few billion years, a passing star could disrupt Earth's orbit and expel it further from the Sun. Scientists have suggested the odds of this are one in 100,000. Unfortunately, our grandchildren will likely end up freezing to death if left without sun or if left in weather like that.
The earth is not only followed by the moon
There are two other objects that orbit near the Earth and are also referred to as moons. Discovered by Cruithne in 1986, 3753 is an asteroid that actually orbits the sun. Our planet isn't meant to be Earth, but because orbiting the Sun takes the same amount of time as Earth, it's as if Cruithne is following our planet.
Asteroid 2002 AA29 also orbits the Sun only once a year, following a more unusual horseshoe-shaped trajectory that brings it closer to Earth (about 5.9 million kilometers or 3.7 million miles away) every 95 years. Due to its proximity to us, scientists suggested collecting samples of AA29 and returning them to Earth.
The silence before the hurricane
Some may think it's just a story or a proverb, but the calm before the storm really does exist. When a storm pulls warm, moist air from the surrounding atmosphere, it leaves an area of extremely low pressure behind. Air is carried into the storm cloud, and some of it is forced upward by strong drafts.
These upgrades remove hot air and push it out onto the sides of the highest storm clouds, which can reach a height of nearly 16 kilometers (10 miles). When the air then descends, it becomes warmer, drier, and therefore more stable. It covers the area below and stabilizes the air inside, causing people within that area to notice the calm before the storm.
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