The nine planets in this solar system somewhat align once every 500 years and are grouped within 30 degrees every one to three alignments. When astrologers describe the planets as being aligned, they do not necessarily mean that all of the planets line up on a perfectly straight line. The last alignment within 30 degrees occurred in 561 B.C., and the next alignment within 30 degrees takes place in 2854.
All of the planets are within the exact same quadrant – within about 90 degrees of each other – about once every 200 years, but they line up more loosely on a more frequent basis. There is never an exact alignment from the vantage point of the sun because of the differences between the axial tilts of the planets in this solar system.Learn More
Historically, there have been nine planets in the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. However, in 2006, the International Astronomical Union decided to reclassify Pluto as a dwarf planet, reducing the official number of planets to eight.Full Answer >
The names of the nine planets in the solar system are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. However, astronomers have reclassified Pluto as a dwarf planet.Full Answer >
The next time any of the planets will align with each other is predicted to be in October 2015. The last time at least three planets aligned was in 2011.Full Answer >
The eight planets of the solar system are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. The four inner planets are terrestrial worlds, while the outer solar system consists of four gas giants sometimes known as the Jovian planets.Full Answer >