"Space fish farming" is progressing smoothly, a number of experiments have been carried out, and the crew of Shenzhou 18 has been in orbit for one month
Since entering the Chinese Space Station on April 26, the Shenzhou 18 crew has been working and living in orbit for a full month. While the three astronauts adapted to the microgravity environment of space, they quickly engaged in various tasks in orbit. During this time, they conducted a number of space science experiments.
!["Space fish farming" is progressing smoothly, a number of experiments have been carried out, and the crew of Shenzhou 18 has been in orbit for one month](https://a5qu.com/upload/images/447fd56f014860d44d65525ea2e49d66.webp)
Currently, various space science experiments in the Chinese space station are progressing steadily. The experimental project of key technology research on advanced aquatic life-saving systems in space, carried out using the life and ecology experimental cabinet, is progressing smoothly. The experimental components carrying four zebrafish and hornworts entered the space station with the Shenzhou 18 spacecraft and conducted on-orbit experiments. Currently, the Shenzhou 18 crew has successfully collected water samples twice and fish food once. During the box replacement operation, it was found that zebrafish showed abnormal directional behaviors such as ventral and dorsal reverse swimming, rotational movement, and turning in circles under microgravity.
!["Space fish farming" is progressing smoothly, a number of experiments have been carried out, and the crew of Shenzhou 18 has been in orbit for one month](https://a5qu.com/upload/images/5b400e840cce10247b3baf3e864f3e66.webp)
In the future, scientists will use the returned recycled water samples, fish eggs and other samples, combined with zebrafish spatial movement behavior videos, to conduct research on the impact of the space environment on the growth, development and behavior of vertebrates, and at the same time provide support for research on material circulation in space-enclosed ecosystems. .
!["Space fish farming" is progressing smoothly, a number of experiments have been carried out, and the crew of Shenzhou 18 has been in orbit for one month](https://a5qu.com/upload/images/d87f725ac3a840a67f3f2da0fd457164.webp)
The combustion science experiment cabinet is one of the eight experimental cabinets carried by the Mengtian experimental module. It supports the basic scientific research of microgravity combustion in orbit. It can help scientists in basic scientific issues of combustion, aerospace propulsion, spacecraft fire prevention and fire extinguishing, Carry out in-depth research on basic and applied technologies such as combustion pollutant control.
!["Space fish farming" is progressing smoothly, a number of experiments have been carried out, and the crew of Shenzhou 18 has been in orbit for one month](https://a5qu.com/upload/images/6a2a845ed6768a37229e582f76cfe2d8.webp)
During this period, the Shenzhou 18 astronaut crew completed the installation of the combustion solenoid valve adapter cable. By installing the adapter cable, the solenoid valve can be remotely controlled to accurately control the fuel flow during the experiment. The crew of Shenzhou 18 also performed burner replacement, vacuuming and exhaust gas removal in the combustion science experiment cabinet.
!["Space fish farming" is progressing smoothly, a number of experiments have been carried out, and the crew of Shenzhou 18 has been in orbit for one month](https://a5qu.com/upload/images/f17d93461028760b92fb2a846cadd350.webp)
The three astronauts also completed the sample replacement of the experimental chamber of the container-free material experiment cabinet and the maintenance of the axis mechanism. Prior to this, a number of key research projects have been carried out in container-free cabinets, and multiple batches of experimental samples have been shipped. Testing, analysis and research are being carried out in the laboratory in order to produce more research results.
!["Space fish farming" is progressing smoothly, a number of experiments have been carried out, and the crew of Shenzhou 18 has been in orbit for one month](https://a5qu.com/upload/images/c0e190978b88aad7795bfd53c4c07733.webp)
Previously, the Shenzhou 18 astronauts also carried out related work such as assembling and testing the material extravehicular exposure experimental device.
!["Space fish farming" is progressing smoothly, a number of experiments have been carried out, and the crew of Shenzhou 18 has been in orbit for one month](https://a5qu.com/upload/images/f335f01bf1865a4f69495ea0b6402594.webp)
Astronauts face a series of physiological challenges brought about by the microgravity environment in space, including changes in the cardiovascular system, muscle atrophy and loss of bone density. Recently, the crew of Shenzhou 18 used an ultrasonic diagnostic instrument to complete carotid artery ultrasound image and spectrum testing; the astronauts used the instrument to detect the bone density of the heel bone of their right foot to study the impact of weightlessness on human bone density. By regularly and scientifically carrying out a series of weightless protection exercise measures such as space treadmill training and resistance training, we can maintain good physical condition and provide support for long-term mission execution.
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