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Space Rock . Eros
Eros is an asteroid but can be called a minor planet. It orbits the sun that sometimes causes it to closely pass as 14,000,000 miles next to Earth. Scientists believe that Eros comes this close to Earth every 1 years. The last time Eros came close to Earth was back in 175. Therefore, the next time it will approach Earth will be in 006. The pathway the asteroid takes can be changed by gravitational pull of other planets. This can change and interfere because of the gravitational pull and how it will approach Earth within the next 15 years.
Eros has been described as having a football or potato shape. The radius is 4. miles, the length about 1 miles, and about 8 miles wide. Its orbit around the sun lasts about 64 days coming as close as 106,000,000 miles and going as far as 165,000,000 miles away from the sun.
Scientists have used Eros as a guide to help determine the Earths average distance to the sun. This was done when Eros was. closest to the Earth.
Custom Essays on Asteroids
Space craft have landed on Venus, Mars, and the Moon but none have ever landed on a moving rock in space. On February 1, 001, Scientists maneuvered NEAR Shoemaker unmanned space craft to a soft landing on the potato - shaped asteroid Eros. NEAR1s mission had already been complete. NEAR stands for Near Earth Asteroid Rendezvous. This particular mission was to orbit Eros for one year but scientists did better than what was expected. They guided the craft by using five engine burners that slowed NEAR to four miles an hour so it could land. NEAR sent signals to Earth with 6 photographs taken at the time of the descent. NEAR solved the mysteries about the Asteroid it took pictures of craters, boulders, and dust. NEAR1s camera was on the landing side. The pictures showed few small craters. Some of the larger craters showed they had been filled. Scientists suggested this was caused by shifting dust on Eros1 exterior. The asteroid showed no atmosphere or water. It is important to know what Eros is made up of to help scientists find out about the beginning of our Solar System.
It would also help to know what Eros is made up of in case it should come too close to Earth. Scientists believed an Asteroid struck Earth 65,000,000 years ago and destroyed the Dinosaurs. They need to know what kind of rock Eros is made from if they are going to have to change its orbit or cause it to explode before it hits Earth. Scientists like Andrew Cheng, John Hopkins University believe Eros has a layered makeup and leads him to believe that Eros was part of a larger body or planet. The layers of the Asteroid look vary flat and seem to run end to end. Furthermore, Scientists believe that most Asteroids of the orbits belong to Mars and Jupiter. They also believe that Asteroids are chunks of a planet that are trying to form since 4.6 billion years ago. The Solar System was very young then and the gravitational field of Jupiter interrupted the forming of new planets. Eros is believed to be one of these planetoids that was coming together and later was broken apart as it was struck by other Asteroids.
Eros1 age is believed to be billions of years old because it has taken a long time and has accumulated many craters.
Since there is no weather, no moisture, and no air there is nothing to smooth away the craters. Therefore, most of Eros exterior is covered with craters. The digital camera on NEAR took clear pictures so scientist could see these features. Mark Robinson, North Western University noted an area called the Saddle by NEAR scientist that had no craters. He described this area as smooth and showed it stands for ten percent of the area seen by the camera. The landing of NEAR shoemaker offered scientist a really clear image of the features of the Asteroid named 4 Eros.
Scientists that study meteors and asteroids have determined the heavenly bodies are made of iron, nickel metal, stone, and stone mixture. These space rocks are thought to be parts of very large asteroids that have struck other asteroids. They then wander into orbits around the sun and eventually can strike other planets or moons.
Fortunately for us, asteroids don1t strike the Earth very often. Astronomers guess that there are 100,000 asteroids. About four and one half billion years ago, there were millions of asteroids when the sun was very young. Astronomers have come to the conclusion that todays asteroids are leftovers from the beginning of the Solar System.
Asteroids and other space rocks have hit our planet Earth more than 150 places were changed by these impacts. Scientists know and can tell of three that were caused by pieces of 1 asteroid and or comet as it orbited Earth.
John G. Spray,New Brunswick University studied craters made by asteroids from France to Canada. He studied lists of craters and discovered the third large crater in Manitoba. All three craters were about the same age. This study showed that these craters were in a line almost ,000 miles long. It was believed that the two smallest craters were made by the small falling asteroid.
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