The Moon, Earth's only natural satellite, is a fascinating and essential part of our planet's existence. Below are some interesting facts about its characteristics, history, and effect on Earth.
NASA and the China National Space Agency (CNSA) plan to send astronauts to Mars as early as the next decade. Naturally, this ambitious goal requires a great deal of planning, research, and the anticipation and preparation for all potential challenges in advance. Among them, astronaut health and safety are paramount. In addition to the hazards associated with the long transit times - radiation and the effects of long periods in microgravity - there's the issue of Mars itself. Aside from exposure to elevated radiation levels, Martian gravity is about 38% of Earth's.
