Planets

A:

One rhyme to remember the planets is "Amazing Mercury is closest to the Sun, Hot, hot Venus is the second one, Earth comes third; it’s not too hot, Freezing Mars awaits an astronaut, Jupiter is bigger than all the rest, Sixth comes Saturn, its rings look best, Uranus and Neptune are big gas balls, Tiny Pluto is the last planet of all." As well as using rhymes to remember the order of the planets, there are also a good selection of mnemonics available.

See Full Answer
Filed Under:
  • What causes Earth's magnetic field?

    Q: What causes Earth's magnetic field?

    A: The leading hypothesis is that the earth’s spinning core causes the Earth's magnetic field, but scientists are unsure about the exact mechanism by which it is created. Iron is the primary constituent of the Earth’s core, and it is able to spin because of its layered construction.
    See Full Answer
    Filed Under:
  • How is Earth different from other planets?

    Q: How is Earth different from other planets?

    A: Earth is unique in that scientists have found the planet to be the only one to have liquid water on its surface, intelligent life forms living on it, a moon that helps regulate surface temperatures, an atmosphere with 21 percent oxygen and plate tectonics, according to Space.com. Scientists believe Earth exists in a "Goldilocks zone" where conditions are just right to support life.
    See Full Answer
    Filed Under:
  • What is the weather on Saturn?

    Q: What is the weather on Saturn?

    A: With an average temperature of minus 288 degrees Fahrenheit and frequent, powerful storms throughout the planet, Saturn is not hospitable to life. Unlike most planets in the Milky Way, Saturn derives its heat from its core rather than from the Sun. The planet is known as a gas giant; it is primarily composed of gases, including hydrogen and molecular helium.
    See Full Answer
    Filed Under:
  • What is the surface temperature on planets?

    Q: What is the surface temperature on planets?

    A: The surface temperatures of the solar system's planets are dependent on how close each planet is to the sun. Planets that have atmospheres are better able to retain heat from the sun, affecting the planet's surface temperature.
    See Full Answer
    Filed Under:
  • Where is Venus located?

    Q: Where is Venus located?

    A: Venus is the second closest planet to the sun, after Mercury. It is part of the solar system, along with Earth and six other planets, which is located in the Milky Way galaxy.
    See Full Answer
    Filed Under:
  • Who discovered that the Earth was round?

    Q: Who discovered that the Earth was round?

    A: The discovery that the Earth is round is most commonly ascribed to the ancient Greek philosopher Pythagoras, while the credit for proving it is usually given to Aristotle. It appears that most ancient Greek philosophers that followed him believed in a round Earth. Since the records from that time are not perfect, it is quite possible that someone before him was aware of the Earth's round shape.
    See Full Answer
    Filed Under:
  • What kind of atmosphere does Neptune have?

    Q: What kind of atmosphere does Neptune have?

    A: Neptune's atmosphere is similar to the atmospheres of other large planets and contains helium and hydrogen. It also has trace amounts of water, ammonia, methane and other ices.
    See Full Answer
    Filed Under:
  • What are some facts about the outer planets in our solar system?

    Q: What are some facts about the outer planets in our solar system?

    A: Outer planets of the solar system are made predominantly of gases. They tend to have many more moons than the inner planets, and outer planets take a shorter period of time to rotate around their axes.
    See Full Answer
    Filed Under:
  • Which of the Jovian planets have rings?

    Q: Which of the Jovian planets have rings?

    A: The four Jovian planets that have rings are Jupiter, Saturn, Neptune and Uranus. The planet with the most visible rings is Saturn; the other three planets have rings that are more faint and difficult to spot.
    See Full Answer
    Filed Under:
  • What are the diameters of the planets?

    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.
    See Full Answer
    Filed Under:
  • Where is Mars located in the sky?

    Q: Where is Mars located in the sky?

    A: Mars is the fourth planet from the sun and the seventh largest at 227,940,000 kilometers, according to the University of Central Florida. The size and close proximity of Mars render it visible in the night sky, especially at certain points during its orbit.
    See Full Answer
    Filed Under:
  • What type of planet is Earth?

    Q: What type of planet is Earth?

    A: According to Encyclopædia Britannica, Earth is classified as a terrestrial planet. A terrestrial planet is rocky, in contrast to the predominantly gas planets found in the outer solar system.
    See Full Answer
    Filed Under:
  • How did Neptune get its name?

    Q: How did Neptune get its name?

    A: Neptune was given its name by its discoverer, Urbain Le Verrier. Honoring the tradition of naming planets after Roman gods, Le Verrier chose Neptune, who was the Roman sea god. He chose this name because of the blue colors that dominate the planet.
    See Full Answer
    Filed Under:
  • How much would a 100 pound person weigh on Neptune?

    Q: How much would a 100 pound person weigh on Neptune?

    A: A 100-pound person who stood, or floated, on the surface of Neptune would weigh 114 pounds. Although Neptune is much more massive than Earth, it's far less dense, so the acceleration of gravity at its surface is weaker than expected for a planet that is 17 times Earth's mass.
    See Full Answer
    Filed Under:
  • Would Mars be a good planet to live on?

    Q: Would Mars be a good planet to live on?

    A: As of 2014, scientists believe Mars is the most likely planet in Earth's solar system, outside of Earth, to support human existence. However, this doesn't say much about the potential for life on other planets, as many major obstacles impede life on Mars without significant technological advancements.
    See Full Answer
    Filed Under:
  • What probes have been sent to Saturn?

    Q: What probes have been sent to Saturn?

    A: As of June 2014, there have been a total of four probes to visit the planet Saturn. Since the Pioneer 11 spacecraft first visited Saturn in 1979, much has been learned about the ringed planet.
    See Full Answer
    Filed Under:
  • What does Neptune look like?

    Q: What does Neptune look like?

    A: Neptune is an ice giant planet that is blue in color and is the fourth-largest planet in the Solar System. When looking at Neptune with smaller detail, an observer will see the planet's blueness as largely smooth and uniform. When looking with more detail, however, the striations on the planet's surface that are caused by storms in Neptune's atmosphere are more apparent.
    See Full Answer
    Filed Under:
  • Is Saturn hot or cold?

    Q: Is Saturn hot or cold?

    A: Saturn is a mostly cold planet, with areas that reach temperatures as low as minus 270 F. There are some regions of the planet that feature temperatures of 80 F, but these remain unfriendly, having an extremely high atmospheric pressure.
    See Full Answer
    Filed Under:
  • How many light years away is Saturn from Earth?

    Q: How many light years away is Saturn from Earth?

    A: Saturn is between 1.2 billion kilometers (0.0001268 light years) and 1.67 billion kilometers (0.0001765) from Earth, depending on where both planets are in their orbits, according to Universe Today. Earth and Saturn are farthest from each other when on opposite sides of the Sun.
    See Full Answer
    Filed Under:
  • When was Mars discovered?

    Q: When was Mars discovered?

    A: While no specific date can be identified for the discovery of Mars, knowledge of the planet dates back to ancient civilizations. Ancient Romans, Egyptians and Chinese astronomers independently discovered and named the planet.
    See Full Answer
    Filed Under:
  • Who discovered Mars?

    Q: Who discovered Mars?

    A: Because Mars with its famous red coloration is readily visible from Earth, it is unknown who first discovered it; NASA lists the planet as "known by the ancients." There are records of its existence as far back as ancient Egypt.
    See Full Answer
    Filed Under: