It is not an easy task to land on a comet that is flying in the solar system at a speed of 150,000 miles per hour (about 240,000 kilometers), and then to collect the comet sample and bring it back to Earth. In order to reduce the difficulty of obtaining comet samples, NASA is developing a "space javelin" that can drill a few meters underground into comets to extract ice and rock samples and bring them back to Earth, helping scientists uncover how planets are formed and life on earth. The mystery of the origin. In order to reduce the difficulty of obtaining comet samples, NASA is developing a "space javelin" that can drill a few meters underground into comets to extract ice and rock samples and bring them back to Earth, helping scientists uncover how planets are formed and life on earth. Mystery of origin In a report from NASA, Robert Wingley of the University of Washington stated: "This technology will allow us to acquire a few kilograms of samples of Mars underground for the first time, helping us to learn more about the objects in the solar system. With the help of this With this technology, we can obtain multiple samples at an additional cost.†The current design of the scientists is to use a spacecraft that performs a sampling-retrieving mission and carries six rocket penetrators. The penetrator will launch when the spacecraft leap to the comet. They are attached to ropes and can reach a maximum speed of 2,240 miles per hour (approximately 3,605 kilometers per hour). They drill down into the ground of the comet, collect samples and put them into a tube, and finally return to Earth. Photo shows container containing sample Space javelins can be used to collect comet samples to help scientists understand how planets form and the origin of life on earth. Photo shows Ison comet, close to the sun In a report from NASA, Robert Wingley of the University of Washington stated: "This technology will allow us to acquire a few kilograms of samples of Mars underground for the first time, helping us learn more about the objects in the solar system. With this technology, we can acquire multiple samples at a little extra cost. It gives us more flexibility while significantly improving the sampling-retrieving ability of any given task." The traditional sampling-retrieving method is to dispatch robots to make a soft landing on celestial bodies, collect samples and then bring them back to Earth. "Rosetta" Comet detector will perform such tasks in August. At that time, it will continue to come close to the Juliumova Glacimei comet and eventually land. Landing is the most dangerous part of the entire Rosetta mission. Professor Wengerly pointed out in early March: "We don't plan to do this. We need to use the kinetic energy of the spacecraft passing by the celestial body. We won't let the spacecraft brake and save energy." The current design of the scientists is to use a spacecraft that performs a sampling-retrieving mission and carries six rocket penetrators. The penetrator will launch when the spacecraft leap to the comet. They are attached to ropes and can reach a maximum speed of 2,240 miles per hour (approximately 3,605 kilometers per hour). They drill down into the underground of the comet, collect samples and put them into a tube, and finally return to Earth. During the test, the scientists launched a penetrator into a 55-gallon (about 208-liter) simulated comet. Simulated comets consist of sand, salt, boulders, or a mixture of them. During the test, the penetrator's tether is pulled back by an electric winch and can be fired at a speed of 70 miles per hour (approximately 112 kilometers). The resulting force is extremely accurate, reaching a maximum of 1,000 pounds (approximately 453 feet). kg). Chief engineer Donald Wegener said: "We had to fix it on the floor because the winch would jump up the entire test rig after each launch. We don't know what would happen in the face of a comet. Comet surfaces are more It is soft, mainly composed of dust, it may be ice mixed with boulders or hard rocks. The composition of different regions of the comet may be different, so we need to design a javelin that can go deep into the ground.†The comet is the solar system. Ice-dust ball left during formation. Scientists hope to conduct an in-depth study of comets to understand the origins of planets and how life forms on Earth. (xiaowen)
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