Shenzhou 6 returns to earth safely

After 5 days and nights traveling in the universe, 4:30 am on October 17 (Beijing time), the two astronauts Tu Tuan Long and Hanh Hai Thang returned to Earth successfully.

Compartment responds when landing

Within 48 minutes, the feedback compartment of the Than Chau 6 vessel decelerated from 7,800m / s to 1m / sec. When the feedback compartment operates at a distance of 343km to the ground in a circular orbit, the speed is about 7,800m / s, after receiving the command from the ground, the spacecraft completes the posture adjustment in the air, detach Orbital compartments, feedback chambers and thrust compartments, followed by motor control so that the spacecraft's speed decreases and separates from orbit, moving into a free-inertial sliding phase.

Before entering the dense atmosphere, the thrust chamber and the feedback chamber separated, the feedback chamber continued to descend to a distance of 100km from the ground, entering the dense atmosphere.

From the speed of thousands of meters per second into the atmosphere, due to the friction of the atmosphere and the hull, a large amount of heat is generated, on the hull, a gaseous plasma layer with a high temperature makes the The boat lost contact with the ground for almost 2 minutes until the ship dropped to a height of 40km from the ground.

When about 15km from the ground, the ship's speed was stable at about 80m / sec. When about 10km from the ground, the device controlling the static pressure by measuring atmospheric pressure has determined the height, the compartment is automatically opened. Although designed to stretch twice to avoid astronauts being hit hard when stretched. When the main umbrella is inflated by blowing two levels, the speed of the feedback chamber gradually decreases from the speed of 80m / sec to 40m / sec, then continues to drop from 8-10m / sec. When about 1 meter away from the ground, 4 back-propelled rockets are activated, the speed of the feedback chamber drops within 2m / s and then drops to 1m / sec. The feedback compartment has landed safely.

The two astronauts stepped out of the cabin in a healthy state, but they still had to live in an isolated environment for two weeks, mainly to protect them from infectious diseases and to they are given a health and recovery test.

This is a necessary process for astronauts, because after a period of time in the air, they are affected by the weightless environment, resulting in the body losing iron, reduced immunity, after back on the ground, the body is still weak, any common virus on the ground is dangerous for them. Long or short isolation times depend on time in the universe and the recovery of the body. In addition, if during the time they live in the air, their bodies are born or infected with a virus that is not on the ground, the isolation will prevent their spread.

Tuyet Nhung ( According to XinhuaNet )