According to NASA, the Orion spacecraft, which is carrying out the manned lunar mission of Artemis 2, began its journey back to Earth on the 7th. According to the mission plan released by NASA, after completing the lunar orbit, the Orion spacecraft will fly out of the gravitational influence range of the moon at approximately 13:23 Eastern Time on the 7th (1:23 Beijing Time on the 8th). Next, the spacecraft will ignite its thrusters at 21:03 Eastern Time on the 7th, performing the first of three orbit correction ignitions to adjust the spacecraft's orbit and further calibrate its return route to Earth. The spacecraft is expected to splash down near the coast of San Diego, California, on the evening of the 10th. According to US media reports, the "re-entry" phase of spacecraft returning to Earth is one of the most risky stages in space missions. The Orion spacecraft carrying out the Artemis 2 mission will enter the Earth's atmosphere at a speed exceeding 30 times the speed of sound, causing severe compression of the air and heating the external temperature of the spacecraft to above 2760 degrees Celsius. According to reports, the heat shield of the Orion spacecraft was found to have hidden dangers during the unmanned lunar test mission of Artemis 1 in 2022. The spacecraft carrying out the mission returned to Earth with abnormal detachment of the heat shield material, and the wear and tear did not meet the design expectations. To address this issue, the Orion spacecraft carrying out the Artemis 2 mission adopted a more gentle approach to adjust its flight trajectory. Collecting performance data of the heat shield is also a key objective of this task. NASA also released a batch of photos taken by the Orion spacecraft during its orbit around the moon on the 6th, including "ground falling" and "solar eclipse". The "ground falling" photo taken from the far side of the moon shows the scene of the Earth falling below the lunar horizon; The "solar eclipse" screen shows that the moon completely covers the sun. From the perspective of astronauts, the moon is enough to completely block the sun, forming a total solar eclipse of nearly 54 minutes. The Artemis 2 manned lunar orbit mission was launched on the 1st, using the Space Launch System rocket and Orion spacecraft to send four astronauts into lunar orbit. According to the official website of NASA, the Orion spacecraft is expected to travel a total of 695081 miles (approximately 1118624 kilometers) from launch to splash down. (New Society)