China's first Mars probeThe 3000n engine of tianwen-1 worked for 20 seconds and successfully completed the first orbit correction。
Since the distance between the earth and Mars is also more than 55 million kilometers, the longest is more than 400 million kilometers ,26 months will be the turn of a close distance, the current Mars probe will have to fly for about half a year to reach Mars, midway need to change orbit many times.
China's tianwen-1 Mars probe has three stages: launch, ground fire transfer, capture and parking. At present, it is in the stage of ground fire transfer, during which there are four midway corrections, requiring engine orbit change.
The mid-way correction at 0700 hours on August 2 was the first time that the actual performance of the engine was verified while the track correction was completed.
July 23 12:41, China on the northeast coast of Hainan Island, China Wenchang space launch site,Successful launch of tianwen-1 probe for the first Mars exploration mission with long March-5 remote-4 launch vehicleAfter about 2167 seconds of flight, the rocket successfully put the probe into the predetermined orbit, and started the Mars exploration journey, taking the first step of planetary exploration in China.
On July 27, the flight control team of Beijing aerospace flight control center cooperated closely with the test team of China Aerospace Science and technology group to control the tianwen-1 probe to look back at the earth about 1.2 million kilometers away from the earth,The earth and the moon are imaged by optical navigation sensor, and the Earth Moon composite image is obtained。 In this black-and-white group photo, the earth and the moon, one big and one small, are crescent shaped, watching each other in the vast universe.