“Lightsail 2” solar sail satellite has been in normal operation for 30 months, laying the foundation for follow-up missions
Since the day humans saw the sky, they have flew up to see what kind of world it is. Especially after the establishment of modern astronomy and even astronautics, after having the basic capabilities of space exploration, they are more full of yearning for other planets.
Compared to landing on the moon, landing on Mars requires 225 million kilometers, and visiting Mars up close requires a long journey. Mars is the second closest planet to Earth. Theoretically, the closest distance to Mars is 54.6 million kilometers, but this has never happened in history.