Did you know that there is a satellite that circle our planet & is set to crash-land on Earth in 8 million years? Its duty may surprise you.
NASA has complete a satellites called LAGEOS or Laser Geodynamics Satellites, which are mainly scientific satellites that learn our planet. The LAGEOS satellite circles our planet so that it can be communicated from several earth stations around the world. LAGEOS design is beautiful. The spacecraft is complete of aluminum-covered brass spheres with a diameter of 60 cm, the satellite is enclosed in 426 cube-corner retroreflectors which make the Satellite look exactly like a giant golf ball. LAGEOS does not have any slat sensors or electronics, and are not attitude-controlled. Its main mission is not that of carrying a message to the prospect populations of our planet, but rather studying and monitoring its advance.