The Earth has been hit by various objects in the past leaving a hole in its surface called craters. This is what NASA reports.
What comes to mind when you hear the word crater? We all know that the surface of the Moon has many craters. Even our solar system was built from the impacts of objects in space. Earth has also been hit by various asteroids and other objects creating craters on its surface. But it should be noted that not all objects heading towards the Earth reach its ground mainly due to the atmospheric layers. These are some of the largest crater impacts that dented the Earth’s surface. But first it is important to know what is an impact crater?
According to information provided by Space Place, NASA, “An impact crater forms when an object such as an asteroid or meteorite collides with the surface of a larger solid object such as a planet or moon. To form a true impact crater, that object must be traveling extremely fast—many thousands of kilometers per hour! When a solid object hits something at these super-fast speeds, it forms a crater no matter how hard it is.”
Here are some of Earth’s famous impact craters
Evidence for really large impacts, such as the Arizona meteorite crater, is harder to find on Earth. The impact history of our homeworld has been largely erased by weather and water or buried under lava, rock, or ice. However, we still find new giant craters from time to time, NASA said. In 2019, a NASA glaciologist discovered a possible impact crater buried under more than a mile of ice in northwestern Greenland.
This followed the discovery, announced in November 2018, of a 19-mile-wide crater beneath Hiawatha Glacier, the first meteorite impact crater ever discovered beneath Earth’s ice sheets. Although these northwest Greenland impact sites are only 114 miles apart, they do not currently appear to have formed at the same time.
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If the second crater, which is more than 22 miles wide, is finally confirmed to be the result of a meteorite impact, it will be the 22nd largest impact crater found on Earth. “We’ve studied the Earth in many different ways, from the ground, from the air and from space; it’s exciting that discoveries like these are still possible,” said Joe MacGregor, a glaciologist at NASA’s Goddard Space Flight Center in Greenbelt. , Maryland, who participated. in both findings.
Craters on Earth
1. Meteor Crater: Meteor Crater (also known as Barringer Crater) in Arizona was the first discovered crater that was formed by an extraterrestrial impact. It was formed 50,000 years ago from a meteorite that could have been up to 150 feet wide traveling at more than 28,000 mph, according to information provided by NASA.
2. Vredefort Crater: Vredefort Crater in South Africa is the largest known impact crater on Earth, nearly 200 miles in diameter. At over 2 billion years old, it is also one of the oldest. Due to erosion over this long period of time, the crater is somewhat difficult to see.