An overview of the planets and the solar system

Because metallic elements only comprised a very small fraction of the solar nebula, the terrestrial planets could not grow very large. Mercury, Venus, Earth, Mars. The giant planets are sometimes also referred to as gas giants.

NASA Ever since the discovery of Pluto inkids grew up learning about the nine planets of our solar system. According to NASA"two of the outer planets beyond the orbit of Mars — Jupiter and Saturn — are known as gas giants; the more distant Uranus and Neptune are called ice giants.

Thus, the Sun occupies 0. The principal component of the Solar System is the Sun, a G2 main-sequence star that contains Ceres was actually considered a planet when discovered in and then later deemed to be an asteroid.

Mercury has been known since at least the time of the Sumerians 3rd millennium BC.

Nine Planets - Solar System Tour

But new Kuiper Belt objects are being discovered very year, at a rate of about one per month. The Moon would be about 30 cm about a foot from the Earth. The radius of the Sun is 0. Check out Table 8. It was likely formed by collisions within the asteroid belt brought on by gravitational interactions with the planets.

Eventually, the core will be hot enough for helium fusion; the Sun will burn helium for a fraction of the time it burned hydrogen in the core. Jupiter, Saturn, Uranus, and Neptune: From left to right: Large bodies in the solar system have orderly motions Planets fall into two main catagories Swarms of asteroids and comets populate the solar system Several notable exceptions to these general trends stand out We have discussed 1,2 and 3 in this session.

Mercury, Venus, Earth, and Mars: Look at the spin periods in days of the planets--if the number is negative it means the planet spins retrograde--backwards to the Earth.

The gas planets are composed primarily of hydrogen and helium and generally have low densities, rapid rotation, deep atmospheres, rings and lots of satellites. The Nine Planets is from the Students for the Exploration and Development of Space SEDS and contains an immense amount of information and links for all the planets and their moons, and everything else you can imagine about the Solar System.

The above diagrams show correct positions for October as generated by the excellent planetarium program Starry Night ; there are also many other similar programs available, some free. The images at the beginning of this section show the orbits of the various constituents of the Solar System on different scales.

What instruments did it have on board? Its day side is scorched by the sun and can reach degrees Fahrenheit Celsiusbut on the night side, temperatures drop to hundreds of degrees below freezing.

The orbits of the planets are ellipses with the Sun at one focus, though all except Mercury are very nearly circular. Some of the worlds have never even been photographed up close.

Mercury, Venus, Mars, Jupiter, and Saturn.

The Planets of the Solar System

You can also use Emerald Chronometer on your iPhone or Emerald Observatory on your iPad to find the current positions. This region is also within the frost linewhich is a little less than 5 AU about million km from the Sun.

Jupiter, the largest planet, is 5. Messenger of the Roman gods Diameter: Frequently small pieces of debris strike the Earth - if they are very small they burn up as "shooting stars" in the atmosphere, if they are larger they may land as meteorites.

The oldest stars contain few metals, whereas stars born later have more.Below is a brief overview of the eight primary planets in our solar system, in order from the inner solar system outward: Mercury The closest planet to the sun, Mercury is.

Planet Facts There are 8 planets in our solar system, they are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. With the exception of Neptune and Uranus the other 6 planets can be seen unaided and all.

Nine Planets - Solar System Tour This website is an overview of the history, mythology and current scientific knowledge of the planets, moons and other objects in our solar system.

Each page has our text and NASA's images, some have sounds and movies, most provide references to additional related information. Currently there are three dwarf planets - Ceres, which is situated in the asteroid belt and is the largest known asteroid in the Solar System, Pluto, which lies beyond Neptune, and Eris, thought to be the largest of the dwarfs, which lies beyond Pluto.

Overview of the Solar System The Planets to Scale; from the sun, the "terrestrial planets" are Mercury, Venus, Earth, and Mars, while the "giant planets" are Jupiter, Saturn, Uranus, and Neptune (Pluto was an oddity at the end*).

The exploration of the solar system is uniquely poised to bring planetary scientists, worldwide, together under the common theme of understanding the origin, evolution and bodies of our solar neighborhood.

An overview of the planets and the solar system
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