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in the solar system what happens every 248 years
The planets were not invented. They formed naturally around four billion years ago.
No, usually the planets are in different directions. Every few years two or three of them line up.
You can't demonstrate something that doesn't happen.
Pluto's orbit is more elliptical than the major planets' orbits, and every time it goes round it spends some years inside Neptune's orbit.
the planets align every millenia
Every 25thousand years.. the next time will be in 2012
Two or three planets align from time to time, but an alignment of all the planets would never happen. The chances of the planets ever lining up in our lifetime is zero. The chances of the planets ever lining up has been calculated to be about once every 8.6 x 1046 years. That's 86 billion, trillion, trillion, trillion years. The age of the Solar System is only about 4.6 x 109 years or 4.6 billion years and the Universe is only about 13.75 billion years old.
The chances of the planets ever lining up are so statistically improbable that it is safe to say it will never happen. The actual chances of the planets ever lining up has been calculated to be about once every 8.6 x 1046 years. (That's once every 86 billion, trillion, trillion, trillion years.) Since the Sun will be gone in about 10 billion years, it is impossible for this to happen.
The time it takes to get from one planet to another depends on the departure and arrival planets. It can take about two years to get from Earth to Mars where it will take about six years to get from Earth to Jupiter.
The planets line up about every 10,000 years.
Neptune orbits the sun roughly every 165 years.
in the solar system what happens every 248 years
The planets were not invented. They formed naturally around four billion years ago.
It's probably they used to somehow study the planets. Already they supposedly "knew" that the other planets evolved around Earth, so then it would have been easier for them to know that the planets lined up every 26 000 years.
The sun doesn't orbit the planets. The planets rotate around the sun and the sun orbits the galactic centre every 225-250 million years.
The planets did not align per say; however they did come into a state of Syzygy ( look on wikipedia; and commit to memory, because its great for Scrabble). On that date (3/10/1982), all 9 planets came with in 91 degrees (this is debated, I've heard as much as 95 degrees) of alignment, on the same side of the sun. This is a very rare event, and will only happen once in the length of human kind. We would have to be pretty lucky to last another million or so years. Looking at it from a purely statistical standpoint, all 9 planets will never perfectly align in the same plane. March 10th 1982 is the closest we will ever get.