Mercury Seven summon the last group. The tests included spending hours on treadmills and tilt tables, submerging their feet in ice water, three doses of castor oil, and five enemas. Six candidates were rejected as too tall for the planned spacecraft. Another 33 failed or dropped out during the first phase of exams. Four more refused to take part in the second round of tests, which eliminated eight more candidates, leaving 18. From the 18, the first seven NASA astronauts were chosen, each a "superb physical specimen" with an IQ above 130, and the ability to function well both as part of
Seven Heavens seven corresponds to the seven classical planets known to antiquity. Ancient observers noticed that these objects moved at different paces in the sky both from each other and from the fixed stars beyond them: Mercury, Venus, the Moon, the Sun, Mars, Jupiter, and Saturn. Unlike comets, which appeared in the sky with no warning, they did move in regular patterns that could be predicted. They also observed that objects in the sky influenced objects on earth, as when movements of the sun affect the behavior of plants or movements of the moon affect ocean tides. While others believe the seven