Perigean spring tide Perigean spring tide A proxigean spring tide (also known as a perigean spring tide) is a tide that occurs three or four times per year when the Moon's perigee (its closest point to Earth during its 29.5-day elliptical orbit) coincides with a spring tide (when the Earth, Sun and Moon are nearly aligned every two weeks). This tide usually adds only a couple of inches to normal spring tides. The Moon's orbit around Earth is elliptical, which causes the Moon to be closer to Earth and farther away at different times. The Moon and the Sun are aligned every two
Around the Moon Around the Moon Around the Moon (, 1870), Jules Verne's sequel to "From the Earth to the Moon", is a science fiction novel which continues the trip to the moon which was only partially described in the previous novel. It was later combined with "From the Earth to the Moon" to create "A Trip to the Moon and Around It". "From the Earth to the Moon" and "Around the Moon" served as the basis for the film "A Trip to the Moon". Having been fired out of the giant Columbiad space gun, the Baltimore Gun Club's bullet-shaped projectile, along with