火星是地球的姐妹星球吗？
user
火星和地球有一些相似之处，比如都有岩石表面和水的存在，但它们在大小、温度和大气成分等方面存在较大差异，所以一般不把火星称作地球的“姐妹星球”。更多时候，火星被称为地球的“邻居”或“表亲”。
assistant
火星 colonization currently faces which major challenge?
user
Mars colonization currently faces several major challenges, including extreme environmental conditions, the long travel time from Earth, the need for sustainable life support systems, radiation exposure, and the psychological effects of isolation. Additionally, there are significant technical and financial hurdles to overcome.
assistant
What are the main components of Mars' atmosphere?
user
The main components of Mars' atmosphere are carbon dioxide (CO₂), which makes up about 95% of the atmosphere, nitrogen (N₂) at about 2.6%, and argon (Ar) at about 1.9%. There are also trace amounts of oxygen (O₂), carbon monoxide (CO), water vapor (H₂O), and other gases.
assistant