There have been seven Apollo missions to the moon, with the last one in 1972. No humans have been to the moon since, but there have been unmanned missions. There is an estimated 400,000 pounds of man-made waste on the moon, including astronaut trash and memorabilia. Neil Armstrong and Buzz Aldrin were the first to […]
Less than 5% of the universe is solid matter, with 68% dark energy and 27% dark matter. Dark energy expands the universe, while dark matter’s gravity can be measured. The sun makes up 99% of the solar system, and it would take 800 years to reach Pluto. The vast majority of the universe is made […]
Space debris, man-made objects left in orbit around Earth, poses a significant risk to navigation and the environment. Abandoned satellites, intentional and accidental releases, and explosions contribute to the buildup of debris. Collisions create more debris, increasing the risk of further collisions. Several international agencies track space debris, and nations have proposed plans to reduce […]
