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.

Know More
Which planets can be seen without a telescope?
Credit: Mitja Kobal Moment Getty Images

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.

Learn more about Planets

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.

    Full Answer >
    Filed Under:
  • Q:

    When were the planets discovered?

    A:

    Mercury, Venus, Mars, Jupiter and Saturn have been known since prehistory. According to NASA, only two non-dwarf planets in the solar system have official discoverers and dates of discovery. These are Uranus and Neptune. Other worlds, such as moons and dwarf planets, were also discovered after the invention of telescopes.

    Full Answer >
    Filed Under:
  • 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.

    Full Answer >
    Filed Under:
  • Q:

    How far are the planets from the sun?

    A:

    The eight described planets all orbit the Sun at different distances; Mercury is the closest planet to the sun, followed by Venus, then Earth, Mars, Jupiter, Saturn, Uranus and Neptune. The distances of the planets are normally measured in kilometers, because scientists use metric measurements. However, scientists also use a unit called an “astronomical unit,” which is equal to the distance between Earth and the sun.

    Full Answer >
    Filed Under:

Explore