What is the situation with Chang e 3 now, and where did Chang e 3 go in the end

The latest news of Chang'e-3: On the evening of the 6th, the Beijing Aerospace Flight Control Center successfully implemented near-moon braking on Chang'e-3, and Chang'e-3 completed the "space brake" and entered the 100-kilometer-high orbit around the moon, and is expected to make a soft landing on the lunar surface on the 14th.

According to CCTV, at 17:53 on December 6, Beijing time, under the precise control of the Beijing Aerospace Flight Control Center, the Chang'e-3 probe successfully implemented near-moon braking and successfully entered the orbit around the moon for a flight around the moon.

At 17:47, the ground scientific and technological personnel issued an order, and the Chang'e-3 probe's onboard variable thrust engine was successfully ignited, and after 361 seconds, the engine was shut down normally. According to the real-time telemetry data monitoring and judgment of the Beijing Aerospace Flight Control Center, Chang'e-3 successfully entered the circumlunar orbit at an average altitude of about 100 kilometers from the lunar surface, and the near-moon braking was a complete success.

The Chang'e-3 satellite is the second phase of the Chang'e project of the China National Space Administration, which is composed of a lander and a rover (i.e., the "Yutu", a lunar rover) to carry out the first soft landing on the moon and an automatic patrol survey, obtain the material composition of the moon and analyze it, and extend the "surface exploration" of the first phase of the project to the internal exploration. The Chang'e-3 spacecraft will cruise on the lunar surface for 90 days, covering an area of 5 square kilometers, and will capture lunar soil for analysis in the vehicle, and the data will be transmitted directly back to Earth.

Chang'e-3 descended to a perilunar point of "15 kilometers" from the moon today.

Chang'e-3 was the last to goMoonHongwan area.

On December 26, 2013, the Hongwan region of the moon entered the night, and due to the inability to obtain energy to maintain the temperature, Chang'e-3 entered the moonlit night hibernation mode and began to "sleep".

In the early morning of December 15, 2014, the Chang'e-3 lander successfully completed all the scheduled work of the thirteenth day and entered the moonlit night hibernation.

On July 28, 2016, the Chang'e-3 lander entered the 33rd lunar night hibernation period on time, setting a new international record for the longest working time on the lunar surface of a probe.

As of September 1, 2020, Chang'e-3 has been on the moon for 2,453 days, and is now in the "decommissioned" state, that is, the long-term management stage, and part of the scientific payload of the lander is still working.

The significance of the Chang'e-3 launch

Since the successful landing on the moon in December 2013 and the launch of the Chang'e-3 probe.

The eight scientific payloads carried out scientific exploration and other exploration tasks of "lunar measurement, sky survey, and earth observation". A total of 7 TB of various types of data were obtained. The ground application system has released these scientific exploration data and the latest exploration and related research to thousands of universities and scientific research units across the country, including Hong Kong and Macao, in a timely manner, which has greatly promoted the enthusiasm for understanding, researching and using the moon at home and abroad, and has achieved a lot of innovative results.

On June 19, 2014, under the careful organization of Beijing Center, the Chang'e-3 lander successfully completed the online torch space relay of the 2nd Summer Youth Olympic Games, which is also a new attempt for China to promote space technology to serve the society.

40 years ago, the United States gave China 1 gram of lunar soil.

This time we personally went to the moon to dig 2000 grams!

For example, our space carrying capacity cannot be regarded as the world's leading - 20 tons is almost our carrying limit (Long March 5).

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Contribution maintainers.

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Chang'e-5 (Chang'e'e 5), by the China National Space Administration.

It is China's first lunar probe to carry out unmanned lunar surface sampling and return, and is China's lunar exploration program.

's finale. [1][2][3]

On November 24, 2020, the Long March 5 Liang-Yao-5 carrier rocket carried the Chang'e-5 probe.

It was successfully launched into space and put into a predetermined orbit [4]. On November 24, Chang'e-5 completed its first orbit correction [5]. On November 25, Chang'e-5 Xiaoxiao completed its second orbit correction [6].

On November 28, Chang'e-5 entered orbit around the moon [7]. On November 29, Chang'e-5 changed from an elliptical circumlunar orbit to a near-circular circumlunar orbit [8]. On November 30, Chang'e-5 merged and separated [9].

On December 1, Chang'e-5 landed in a pre-selected landing zone on the front side of the Moon [10]. On December 2, the Chang'e-5 lander and ascent vehicle assembly completed lunar drilling, sampling, and encapsulation [11]. On December 2, Chang'e-5 completed automatic sampling and packaging on the lunar surface [12].

On December 3, the Chang'e-5 ascender sent the sample-carrying ascender into a predetermined orbit around the moon. [13] On December 6, the Chang'e-5 ascender rendezvous and docked with the orbiter and returner assembly, and transferred the sample container to the returner [14]. At 12:35 on December 6, the Chang'e-5 orbiter and returner assembly separated from the ascender and entered the circumlunar waiting stage, preparing to return to Earth at the right time [15].

On December 8, the Chang'e-5 ascender deorbited and landed at the intended landing point [16]. On December 12, the Chang'e-5 orbiter and returner assembly carried out the first moon-to-Earth transfer incidence [17]. On December 16, the Chang'e-5 probe successfully completed the second Moon-Earth transfer orbit correction [18].

In the early morning of December 17, the Chang'e-5 returner landed on Earth with lunar samples [19].

The Chang'e-5 mission is the sixth mission of China's lunar exploration program and China's aerospace program.

One of the most complex and difficult missions (as of December 2020) was to achieve China's first unmanned lunar sample return, contributing to scientific research on the origin and evolutionary history of the moon [20].

First, Yutu discovered a new type of basalt, and the scale of this basalt unit is huge. The particle excitation X-ray spectrometer obtained the accurate content of 12 elements of lunar soil. Compared with the lunar soil in the Apollo Moon Sea Basin, we found that the lunar soil at the Chang'e-3 landing site had higher iron and titanium content, while lower aluminum content, showing a completely different composition, indicating that the basalt underneath it is a new type of absolution.

In addition, the lunar soil here is rich in potassium, zirconium, yttrium, niobium, indicating that this basalt is mixed with 10-20% of the Cripp component. According to the Yutu detection results, the basalt may have been formed by the partial melting of the source area of the lunar mantle rich in iron and titanium, and then mixed with the kripping rock layer at the base of the lunar crust during the uploading process, and finally overflowed the lunar surface and filled the Yuhai Basin. Importantly, radar detected a thickness of 195 meters in this young basalt formation, suggesting that there were large-scale volcanic eruptions in the Yuhai Basin up to 2.5 billion years ago.

Secondly, for the first time, Yutu used radar to measure the thickness of lunar soil on the lunar surface. Borrowing signal processing techniques such as instantaneous spectrum analysis and offset imaging in the field of exploration, we obtained the structure and thickness of the lunar soil in the landing zone. The lunar exploration radar profile shows that the lunar soil has a layered structure, with the top layer about a meter thick and uniform texture, almost no stones, and the bottom boundary has certain undulations, with an average thickness of about 5 meters.

Since the lunar soil is formed by asteroids impacting the surface rocks of the moon, the older the geological age, the greater the thickness of the lunar soil. The age of the Chang'e-3 landing area is significantly smaller than that of other lunar sea areas, but the measured lunar soil thickness is significantly larger than the 2 4 m estimated by other indirect methods, indicating that the lunar soil thickness of the whole moon may be underestimated. Since important resources such as helium-3 and hydrogen are mainly found in lunar soil, this discovery will have a great impact on the estimation of the reserves of these important resources.

In addition, Yutu also performed chemical composition and spectral analysis of the original lunar soil on the lunar surface, and the results can be used as the correction standard value of the lunar orbit remote sensing detection data, improving the interpretation accuracy of the chemical composition and mineral composition of the whole moon. Orbital remote sensing can detect the chemical composition distribution of the whole moon, but the accuracy and accuracy are poor. On the other hand, in-situ measurements have high accuracy and accuracy, but can only detect a specific location. In the absence of in-place measurement data, it is quite difficult for scientists to assess the precision and accuracy of orbital remote sensing data.

The in-place detection data returned by the Yutu is equivalent to providing a comparable standard for the orbit measurement data, because this site has both the in-place detection data and the orbit detection data. By comparing it to the in-place sounding data, scientists can make corrections to the way the orbital sounding data is processed, improving precision and accuracy.