I am not sure but on the move 2012 they said it was 3 million years....
This event is known as a Great Conjunction, where the orbits of Jupiter and Saturn align roughly every 20 years. However, a planetary alignment involving all the planets is a rare occurrence and may not happen exactly every 100 years.
All planets in our solar system will never align perfectly in a straight line due to their different orbital paths and speeds. The closest alignment that occurs is called planetary alignment, and it happens roughly every 500 years.
Jupiter and Saturn aligned in what is known as the "Great Conjunction" in December 2020. This alignment occurs approximately every 20 years, but the 2020 event was particularly special because it was the closest observable alignment of Jupiter and Saturn in nearly 400 years.
First of all, it is impossible for all the planets to form a straight line out from the Sun (or viewed superimposed on each other in the sky) because each planetary orbit is tilted slightly.In April 2036 there will be an "alignment" insofar as all five planets that can be visible to the naked eye will appear together in the evening skyIn September 2008 there was an alignment in space (not in line with the sun) nor visible to earthlings (some planets were on one side others on the other side of Earth.
"One calculation of alignments within around thirty degrees (about as close as they can get) shows that the last such alignment was in 561 BC, and the next will be in 2854. All nine planets are somewhat aligned every 500 years, and are grouped within 30 degrees every 1 to 3 alignments."http://curious.astro.cornell.edu/question.php?number=203
How can astronomers predict planetary alignment
This event is known as a Great Conjunction, where the orbits of Jupiter and Saturn align roughly every 20 years. However, a planetary alignment involving all the planets is a rare occurrence and may not happen exactly every 100 years.
All planets in our solar system will never align perfectly in a straight line due to their different orbital paths and speeds. The closest alignment that occurs is called planetary alignment, and it happens roughly every 500 years.
Every 5 years, or as needed like when it pulls to the side.
The next syzygy, when the Earth, Sun, and Moon align, will occur during a new moon or full moon phase. These alignments happen roughly every 29.5 days, so the next syzygy will be around that timeframe.
have it checked every two years or if see wear on inside outside of tires
Jupiter and Saturn aligned in what is known as the "Great Conjunction" in December 2020. This alignment occurs approximately every 20 years, but the 2020 event was particularly special because it was the closest observable alignment of Jupiter and Saturn in nearly 400 years.
Every 6years
First of all, it is impossible for all the planets to form a straight line out from the Sun (or viewed superimposed on each other in the sky) because each planetary orbit is tilted slightly.In April 2036 there will be an "alignment" insofar as all five planets that can be visible to the naked eye will appear together in the evening skyIn September 2008 there was an alignment in space (not in line with the sun) nor visible to earthlings (some planets were on one side others on the other side of Earth.
In every 2 years
All of the planets in our solar system rarely align perfectly due to their different orbital paths and speeds. When a multi-planet alignment does occur, it is not generally a true line-up in space but rather an alignment as seen from Earth. Such alignments can happen every few decades, but a perfect alignment where all planets are in a straight line is extremely rare and has not occurred for hundreds of years.
it is every 8 years between filing dates for chapter 7s.