Тест 6

Named for the fleet-footed Roman messenger god, Mercury is the closest planet to the sun,19пропуск 19, текущийaround our parent star at an average of 36 million miles away. Mercury is the20пропуск 20planet in the solar system, speeding along at about 29 miles per second and completing each orbit around the sun in just 88 Earth days. Mercury is only slightly larger than Earth’s moon. If you21пропуск 21watch the skies from the surface of Mercury, you would sometimes catch the rare sight of the sun in retrograde. That means someone standing on Mercury would see the sun start to rise, then briefly set, then rise again all within the same day.