A high - altitude plateau 5000 meters above sea levelA high - altitude plateau 5000 meters above sea level
Lightning on the background of antennas in new mexicoLightning on the background of antennas in New Mexico
Antennas on the background of a beautiful starry skyAntennas on the background of a beautiful starry sky
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
The space of supernova galaxies. space and the nebulaThe space of supernova galaxies. Space and the nebula