Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and the Dwarf Planets Pluto, Eris, MakeMake, Ceres and Haumea. With the possibility of a Super Giant Planet called Tyche out in the Oort cloud, that is possibly 4 times the size of Jupiter. (This has not been confirmed as of now, possible release date of confirmation will be this year 2011)
There are many, many asteroids - chunks of rock of various sorts - that orbit the Sun from a location between Mars and the outer planets. Comets - hunks of ice and perhaps space dust - orbit the Sun in really long, stretched out ellipses. There are likely some smaller planetesimals that orbit far outside of the known planets.
The Sun, asteroids, comets and dwarf planets.
Planets.
He placed the sun in the middle with the planets orbiting it.
Ceres, Eris (formerly UB313) and Pluto are dwarf planets. Charon is Pluto's largest moon. The change in planetary classification was made in August, 2006 by the International Astronomical Union (IAU), and the dwarf planets are defined as non-satellite Sun-orbiting bodies that do not "clear out their (planetary) neighborhood" as major planets do. As of January, 2009, the five dwarf planets include these 3 plus 2 more Kuiper Belt Objects, Haumea and Makemake.
Scientist classifies these objects based on their sizes, shapes, compositions, and orbits. The major categories include dwarf planets, comets, asteroids, and meteoroids.
Of the 8 major planets, Mars is the second smallest, after Mercury. Mercury is only about 38% as large as Earth, while Mars is about 53% as large. There are, of course, many smaller bodies that are dwarf planets, Kuiper Belt objects, asteroids, and moons.
This is the definition of our solar system.
The sun has 8 or 9 major planets and thousands of smaller objects orbiting around it. Some of the planets have many moons. (eg Neptune has 13) It can have moons but so far all of the moons are to close to the planets to get caught in the sun's orbit.
planets
The sun.
He placed the sun in the middle with the planets orbiting it.
The Sun has 8 major planets orbiting it, as well as asteroids, meteoroids and comets. However, it can never have a moon because moons are objects that orbit a planet, not a star, like the sun.
Ceres, Eris (formerly UB313) and Pluto are dwarf planets. Charon is Pluto's largest moon. The change in planetary classification was made in August, 2006 by the International Astronomical Union (IAU), and the dwarf planets are defined as non-satellite Sun-orbiting bodies that do not "clear out their (planetary) neighborhood" as major planets do. As of January, 2009, the five dwarf planets include these 3 plus 2 more Kuiper Belt Objects, Haumea and Makemake.
Over 900 planets have been discovered orbiting other stars. These are called exoplanets.
Scientist classifies these objects based on their sizes, shapes, compositions, and orbits. The major categories include dwarf planets, comets, asteroids, and meteoroids.
Roughly in order of decreasing size and mass, the objects in the Solar System are: the Sun; the planets; moons; dwarf planets; other planetoids; comets.
The eight major planets all have 3 things in common that no other objects in our solar system have:They orbit the SunThey are spherical because of their own gravityThey have cleared their orbital paths of smaller objects and debris
Of the 8 major planets, Mars is the second smallest, after Mercury. Mercury is only about 38% as large as Earth, while Mars is about 53% as large. There are, of course, many smaller bodies that are dwarf planets, Kuiper Belt objects, asteroids, and moons.
The "world" constitutes the planet Earth. There are 8 major planets around the Sun in our solar system, and many more orbiting other stars. (see related question)