Which planets can be seen without a telescope?
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Q:

Which planets can be seen without a telescope?

A:

Quick Answer

Mercury, Venus, Mars, Jupiter and Saturn are the five planets that are visible without a telescope. These five planets were known to ancient astronomers long before the invention of telescopes. Some experts also include the Earth on the list of planets you can see with the naked eye.

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Full Answer

Ancient astronomers considered these five planets, along with the moon and the sun, to be the seven special celestial objects. This gave rise to the notion of seven heavens in many ancient religions. Ancient astronomers used the movements of the planets to track the seasons, decide when to plant crops and to predict the future.

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Related Questions

  • Q:

    What planets are visible from Earth?

    A:

    The five planets which are visible from Earth, using the naked eye, include Saturn, Jupiter, Mars, Venus and Mercury. Because of difference in their orbits, though, it is rare for all of them to be visible in the night sky at the same time, explains National Geographic.

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  • Q:

    What are the diameters of the planets?

    A:

    The diameters of the planets are as follows: Mercury is 3,032 miles; Venus is 7,521 miles; Earth is 7,926 miles; Mars is 4,222 miles; Jupiter is 88,846 miles; Saturn is 74,898 miles; Uranus is 31,763 miles; Neptune is 30,778 miles. As a result, the largest planet by diameter is Jupiter and the smallest is Mercury.

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  • Q:

    What is the order of the planets?

    A:

    Beginning with the planet closest to the Sun and moving outward, the order of the planets is Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Before its reclassification as a dwarf planet by the International Astronomical Union in 2006, Pluto was considered the ninth and most distant planet.

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  • Q:

    What are the names of the planets?

    A:

    The names of the inner, or terrestrial, planets are Mercury, Venus, Earth and Mars. The outer planets are Jupiter, Saturn, Uranus and Neptune. Pluto was once designated a planet but has now been demoted to a dwarf planet.

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