A small, irregularly shaped rock of iron and nickel, many of which are located in the Asteroid Belt. The largest asteroids are Ceres (900-km diameter), Pallas (500-km diameter), and Vesta (500-km diameter).
Metallic, rocky objects without atmospheres that orbit the Sun, but are too small to be called planets. A group of these objects make up the asteroid belt between Mars and Jupiter. Scientist believe that asteroids are pieces of the material that formed the solar system.
Small, irregularly shaped rocks of iron and nickel that are scattered in an orbital ring around the Sun between the orbits of Mars and Jupiter. The largest are Ceres (900-km diameter), Pallas and Vesta (500-km diameter).
An object orbiting the Sun that is smaller than a major planet (tens of meters to about 1,000 km diameter), but shows no evidence of an atmosphere or other types of activity associated with comets. Most asteroids are located in a belt between Mars and Jupiter from 2.2 to 3.3 AU from the Sun.
Also called "planetoids" or "minor planets," the asteroids are small rocky bodies that orbit a star (like the Sun). In the Solar System, most asteroids lie between the orbits of Mars and Jupiter. The largest asteroid -- and the first discovered -- is Ceres, about 900 kilometers in diameter. More than 1800 have been catalogued, and probably millions of smaller ones exist.
Literally, a small body in space that looks like a star. Also called a minor planet, or planetoid. One of tens of thousands of small bodies orbiting the Sun, mostly between the orbits of Mars and Jupiter, in the so-called asteroid belt.
a small body, similar in composition to one of the terrestrial planets. Asteroids come in a wide variety of sizes in shapes. The majority of asteroids are found in the asteroid belt between the planets Mars and Jupiter. It is believed that the asteroids there would have formed into a planet had Jupiter's gravitational forces not been so strong as to disrupt that formation
A fragment of a planetesimal (or possibly an aggregate of fragments). Most asteroids orbit the sun between Mars and Jupiter, although many also have orbits which cross that of the Earth and are thus called near-Earth asteroids (NEA's).
A small, rocky object revolving around the Sun, sometimes called a minor planet or planetoid. The vast majority of asteroids is found in the asteroid belt, a region between the orbits of Mars and Jupiter. The largest known asteroid, Ceres, has a diameter of 926 kilometers (579 miles).
A small body that orbits the sun. Most asteroids are thought to be the result of debris left over from the formation of the solar system. Most asteroids occur in the region between Mars and Jupiter. Collisions among the bodies in the asteroid belt and adjacent planets displace fragments and place them on a collision course with Earth. The asteroid belt is thought to be the source of most meteorites. More information can be found at: Asteroids data sheet (SPACE.com, USA).
These are small rocky bodies, smaller than planets, these bodies are so small that they do not form spheres, but are irregular in shape. Most asteroids can be found in the asteroid belt between Mars and Jupiter. Some asteroids have high orbital eccentricities and orbital inclination. There are collections of asteroids, trapped gravitationally at Jupiter's trojan points.
a rocky body orbiting the sun. Most asteroids are located in the asteroid belt between Mars and Jupiter. Asteroids are much smaller than the Earth or the Moon. The largest one is called Ceres and it is about 933 kilometers across. The next largest are 2 Pallas, 4 Vesta and 10 Hygiea which are between 400 and 525 km in diameter. All other known asteroids are less than 340 km in diameter.
One of billions of rocky objects, less than 1000 km in diameter, which orbit the Sun. Also known as minor planets. Thought to be planetesimals leftover from the formation of the planets. The first asteroid (Ceres) was discovered by Giuseppe Piazzi in 1801. More than 10 000 asteroids have so far been discovered and given permanent identification numbers. The largest asteroid is 2001 KX76 with a diameter of at least 1200 km.
One of the many thousand chunks of rock or iron that orbit the Sun, also known by the older term, minor planets. Most asteroids orbit between Mars and Jupiter, where they formed; but some cross the orbit of Earth.
a large planetary object which may measure in size from half a mile to hundreds of miles in diameter. Asteroids lie in the asteroid belt, the zone between the orbits of Mars and Jupiter. Asteroids generally travel in mildly elliptical paths around the sun. Some asteroids orbit the sun in such erratic paths that their orbits take them far within the orbit of Mars or far beyond the orbit of Jupiter where they must be of exceptional size in order to be observed. Some larger asteroids have been sighted within a few million miles of the earth. Some smaller asteroids have passed within roughly 600,000 miles of the earth. Traveling fast, they can be observed for only brief periods of time and then are lost to view. Like planets, asteroids travel in a counterclockwise direction around the sun.
(Also "planetoid") These are rocky bodies, the vast majority of which orbit the Sun between Mars and Jupiter. It is thought that there must be around 100,000 in all. The largest asteroid is Ceres which has a diameter of 579 miles. The smallest detected asteroids have diameters of several hundred feet. Together with comets and meteoroids, asteroids make up the minor bodies of the solar system. They are considered to be left over planetessimals from the formation of our solar system. The gravitational pull of Jupiter is thought to have stopped the members of the asteroid belt from forming a planet.
A small planetary body in orbit around the Sun, larger than a meteoroid but smaller than a planet. Most asteroids can be found in a belt between the orbits of Mars and Jupiter. The orbits of some asteroids take them close to the Sun, which also takes them across the paths of the planets.
a.k.a. minor planet. Rocky body much smaller than a planet. There are currently over 10,000 known asteroids, 95% of which are situated between the orbits of Mars and Jupiter with an orbital period of 3-6 years. The other 5% of asteroids have much different orbits, some of which cross Earth's orbit, the so-called Apollo and Aten asteroids. Included in this number are the Potentially Hazardous Asteroids.
any of thousands of celestial bodies with diameters between one and five hundred miles that revolve around the sun in orbits located mostly between those of Jupiter and Mars; planetoid. meteor a small mass, speck, or remnant of matter traveling through space or falling to earth, or the fiery streak in the sky made by the friction of its passage through the earth's atmosphere; meteorite or meteoroid.
Any of the numerous small rocky bodies in orbit around the sun. Most asteroids reside in the "main belt" between Mars and Jupiter, but some have orbits that cross the Earth's orbit and could strike its surface.
Any one of the thousands of bodies in space ranging in size from large boulders to miles in diameter which orbit the sun in a region known as the asteroid belt. The asteroid belt lies between the orbits of mars and Jupiter. To date, over two thousand of these bodies have been identified and catalogued. The largest asteroids are Chiron, Astraea, Juno, Vesta, Pallas and Ceres.
One of a number of objects ranging in size from sub-km to about 1000 km, most of which lie between the orbits of Mars and Jupiter; also called 'minor planet'. The preliminary designations consist of the year of discovery, an upper case letter to indicate the halfmonth in that year (A=Jan 1-15, B=Jan 16-31, ..., Y=Dec 16-31, the letter I being omitted), and a second upper case letter in sequence. When this sequence of 25 letters (with I again being omitted) has been completed it is repeated and followed by a sequential number. Permanent designations consist of numbers and names, beginning with (1) Ceres, given to asteroids for which orbits are accurately determined. Names are generally proposed by the discoverer. See also: Apollo asteroids, Aten asteroids, Meteoroid Stream
Asteroids, also called minor planets or planetoids, are a class of astronomical object. The term asteroid is generally used to indicate a diverse group of small celestial bodies that drift in the solar system in orbit around the Sun. Asteroid (Greek for "star-like") is the word used most in the English literature for minor planets, which has been the term preferred by the International Astronomical Union; some other languages prefer planetoid (Greek: "planet-like"), because it more accurately describes what they are.
Asteroid is a 1997 TV movie about the American Government trying to stop an asteroid colliding with the Earth. It stars Michael Biehn. The movie won the 1997 Emmy Award in category Outstanding Special Visual Effects.