Q:

When is the next time all the planets will align?

A:

Quick Answer

The next planetary alignment will not occur until the year 2854. According to astronomers, such alignment typically occurs every 1500 years, with the last phenomenon appearing in 561 B.C.

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When is the next time all the planets will align?
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Full Answer

Speaking of planetary alignment, the term should not be taken to mean that the planets will line up perfectly. That is an occurrence that can never happen due to the unique orbits of the planets. Scientists typically refer to alignment as being the instance where the orbits of the heavenly orbs are all within 30 degrees of each other. When there is a perfect alignment, usually only two or three planets make it to the party.

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Related Questions

  • Q:

    When will all the planets in our solar system align?

    A:

    The next planetary alignment in the solar system will occur in 2854. While the planets will not ever be aligned in a straight line, they will reach their closest possible proximity that year.

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  • Q:

    How do astronomers predict planetary alignment?

    A:

    To predict planetary alignment, astronomers use the angular speeds of travel around the sun of different planets. Alignment occurs when any of the planets is in a direct line with the Earth and the Sun.

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  • Q:

    Will all nine planets ever align?

    A:

    It is not possible for all nine planets to align perfectly because the axes around which they rotate tilt at different angles. The planets do end up within 90 degrees of each other about once every 200 years.

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  • Q:

    How many moons are in the solar system?

    A:

    The number of moons is constantly changing for some planets as they are discovered, but at the last official count there are 166 moons, with more than 20 waiting to be recognized as moons. This count is only of the moons that orbit recognized planets in the solar system. There are numerous other satellites, like asteroids, that have what would be considered moons circling them as well.

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