This time we are looking on the crossword puzzle clue for: Org. that listens for alien signals.
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Random information on the term “SETI”:
The planet Mercury has often been used as a setting in science fiction. Recurring themes include the dangers of being exposed to solar radiation and the possibility of escaping excessive radiation by staying within the planet’s slow-moving terminator (the boundary between day and night). Another recurring theme is autocratic governments, perhaps because of an association of Mercury with hot-temperedness. Nonetheless, there may be scientific support, based on studies reported in March 2020, for considering that parts of the planet may have been habitable, and perhaps that actual life forms, albeit likely primitive microorganisms, may have existed on the planet after all.
A clement twilight zone on a synchronously rotating Mercury, a swamp and jungle Venus, and a canal infested Mars, while all classic science fiction devices, are all, in fact, based upon earlier misapprehensions by planetary scientists.
Giovanni Schiaparelli announced in 1889 that Mercury was tidally locked to the Sun, orbiting with one face permanently turned toward it and another face turned away. Theories stated that the “brightside” had molten metal puddles, the “darkside” had the planet’s former atmosphere in frozen form, and a “twilight belt” between the two. This concept of Mercury was disproven in 1965, when radio astronomers discovered that Mercury rotates three times for every two revolutions, exposing all of its surface to the Sun, except for craters of eternal darkness.