lähiavaruudessa

Lähiavaruus, or the near space, refers to the region of space that is closest to Earth. It extends from the Kármán line, approximately 100 kilometers above sea level, to the outer limits of Earth's atmosphere, which is roughly 10,000 kilometers above sea level. This region is characterized by the presence of Earth's atmosphere, which gradually thins out with increasing altitude.

The lähiavaruus is home to a variety of human-made objects, including satellites, space stations, and spacecraft. These objects are used for a wide range of purposes, such as communication, navigation, weather forecasting, and scientific research. The International Space Station (ISS), for example, is a large, habitable satellite that orbits Earth at an altitude of about 400 kilometers.

The lähiavaruus is also the site of many space missions, including those to the Moon and other planets. For instance, the Apollo missions to the Moon took place in the lähiavaruus, as did the Space Shuttle program. These missions have significantly advanced our understanding of space and our place in the universe.

Despite its proximity to Earth, the lähiavaruus is a challenging environment for human exploration. The lack of a breathable atmosphere, extreme temperatures, and high levels of radiation make it difficult for humans to survive without specialized equipment. However, advancements in technology continue to push the boundaries of what is possible in the lähiavaruus, opening up new opportunities for exploration and discovery.