Eavesdropping on outer space- search ????other civilizations have been going on for 50 years, but the results are scantyEavesdropping on outer space- search ????other civilizations have been going on for 50 years, but the results are scanty
Plateau at an altitude of 5000m with an observatoryPlateau at an altitude of 5000m with an observatory
Shining stars on a background of green glow in spaceShining stars on a background of green glow in space
Antennas on the background of a beautiful starry skyAntennas on the background of a beautiful starry sky