A lonely tree on the background of a cosmological landscapeA lonely tree on the background of a cosmological landscape
Separation of the earth and the night sky, light on the horizonSeparation of the earth and the night sky, light on the horizon
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