Tuesday , December 1 2020

Interpret the challenges that have hidden behind Japan to bring a rock back to the ground – Science Exam – cnBeta.COM



A small asteroid examiner launched by the Japanese Aerospace Audit Agency (JAXA) in 2014 successfully achieved a very fast flight asteroid surface. He collected samples and was ready to bring back to Earth for research.Given that the asteroid "Ryugu" is a small rock that drives in space approximately 300 million kilometers (186 million miles) of Earth, this is an exciting achievement.

The "ostrich 2" sensor is ready to land on the face of the "Palace Palace" asteroid "

The asteroid sensor "ostrich 2" took almost four years to reach the "Palace Palace" asteroid, which is the second time people have collected samples of such asteroids.

Bringing such samples back to the Earth has been exciting for many people. This has swept the hard sweat of scientists, and what are the hard challenges and the great meanings that have hidden behind them?

1. A rocket load is limited

Before asteroid asthma sends, one needs to find an effective way of analyzing the composition of asteroid minerals. The biggest obstacle here is that the rocket is limited by size and weight, its pay pay is limited, so people can not assemble the best scientific equipment on the rocket. In this sense, human scientific analysis on the face of these asteroids is always limited.

To excitement and the scientific community, Japanese scientists have found a great deal of work: samples taken back to asteroids on Earth are analyzed.

2, landing difficulties

To achieve this great sport, the "ostrich 2" had to keep its orbit of its room for more than six months after arriving at the "Palace Palace" diamond shape. During this time, the JAXA team studied the asteroid carefully and plans were made for the safe landing of the sensor. The ostrich 2 screwed two Rover-1A (HIBOU) and Rover1B (OWL) hopper sensors of orbit to inspect the asteroid land and locate the landing site.

This is a very complicated task, because when two sensors hope to perform discovery trips, the ostrich 2 must stay in an orbit around the asteroid, which at the time flows faster than the ground. 22,000 km / h (13,891 mph).

When the sensor discovered that the surface of the asteroid was challenging the landing of Cover 2, the adventure became even more time. Although JAXA scientists have begun to start the face of "Dragon Palace" as a "very solid powder layer of powder," the sensor came to the conclusion that the surface of the asteroid actually involves grit more than expected .

The "ostrich 2" sensor has landed in a purple ring (about 6 meters of diameter). The opposite indicates the location where the scheme is intended to end.

In fact, the "ostrich 2" can take advantage of the torque generated by the sensor's internal rotation mass, allowing the Dragon Gravel low gravity area and move around the asteroid. This is completely different from wheel detectors used by people to explore the Moon and Mars.

3, three sampling

After landing safely, "ostrich 2" bullets have a fire at the bottom of the asteroid, creating a smaller pile of soft screws. The ostrich 2 collects these small pieces and rises again to the asteroid orbit.

In the coming weeks to months, "ostrich 2" will also have two other samples of the "Palace Palace". The second sampling will be similar to the previous one, but the third time will be different. At the time, "ostrich 2" will be a copper bullet fire first on the face of the "Palace Palace", waiting for the dust to be cleared, and then plumbing to the asteroid. The surface has been loaded with pieces of rock.

4, lasted for several years

Although almost 16 asteroids including asteroids, dwarf planets and other celestial bodies have been detected by human space boxes so far, "ostrich 2" is the second successful human sensor. Wait on the asteroid and sample the records brought back to Earth. The previous record comes from the predecessor of the current sensor, the "ostrich".

At the 2005 mission, the detector launched by JAXA successfully declined on the Itokawa asteroid and collected samples of small particles sent back to Earth by the spacecraft on June 13, 2010. During the five years In this case, Japanese scientists have been monitoring all movements of the "Ostrich" sensor. The long journey has also proven patience scientists, and the unexpected difficulties during this period are numerous.

5. Explore the history of the solar system

The main aim of "ostrich 2" is to help scientists better understand the early history and evolution of the solar system, especially the early history and evolution of the planets inside the solar system – Mercury, Venus, Earth and Mars. This task can also help people understand the role of asteroids such as Palace Palace in forming life on Earth. This issue remains a mystery. Scientists now believe that water, which is considered a key part of the mystery, can be transported from other asteroids to Earth.

After the successful completion of the ostrich, JAXA announced in 2013 that there were around 1,500 extra surface particles, including olivin, pyroxen, plagioclase and iron sulphide of these samples.

NASA also designed a similar mission. NASA's "OSIRIS-REx" scanner arrived last December with Setting a carbon-rich asteroid, 500 meters diameter. The sensor is intended to have samples in 2020 and samples of a ship to Earth in September 2023.

Perhaps through more such tasks, people will be able to bring together the history of the origin of life and find ways to harness the extensive mineral resources of asteroids.


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