On This Day - December 1st 1997
Eight of the known planets in the solar system form a rare alignment from west to east.
On 1 December 1997, eight of the known planets of our solar system aligned from west to east. The alignment, which also included the Earth's moon, began with Pluto and continued with Mercury, Mars, Venus, Neptune, Uranus, Jupiter, and Saturn in that order. All but the farthest planets, Pluto, Uranus and Neptune, could be seen with the naked eye. Uranus and Neptune were visible with binoculars, but a telescope was needed to see Pluto. Another alignment occurred in May 2000, but the planets were too close to the sun to be visible from the Earth.