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Asteroid belt
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The asteroid belt is a torus-shaped region in the Solar System, centered on the Sun and roughly spanning the space between the orbits of the planets Jupiter and Mars. It contains a great many solid, i
By far the largest object within the belt is the dwarf planet Ceres. The total mass of the asteroid belt is significantly less than Pluto's, and rough
By far the largest object within the belt is the dwarf planet Ceres. The total mass of the asteroid belt is significantly less than Pluto's, and roughly twice that of Pluto's moon Charon.
In 1596, Johannes Kepler's sense of proportion for the planetary orbits led him to believe that an undiscovered planet lay between the orbits of Mars
In 1596, Johannes Kepler's sense of proportion for the planetary orbits led him to believe that an undiscovered planet lay between the orbits of Mars and Jupiter.
Giuseppe Piazzi, discoverer of Ceres, the largest object in the asteroid belt: Ceres was known as a planet, but later reclassified as an asteroid and
Giuseppe Piazzi, discoverer of Ceres, the largest object in the asteroid belt: Ceres was known as a planet, but later reclassified as an asteroid and from 2006 as a dwarf planet.
951 Gaspra, the first asteroid imaged by a spacecraft, as viewed during Galileo's 1991 flyby; colors are exaggerated
951 Gaspra, the first asteroid imaged by a spacecraft, as viewed during Galileo's 1991 flyby; colors are exaggerated
4 Vesta
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Vesta is one of the largest objects in the asteroid belt, with a mean diameter of 525 kilometres. It was discovered by the German astronomer Heinrich Wilhelm Matthias Olbers on 29 March 1807 and is na
Asteroid belt
…disc in the Solar System. Its total mass is estimated to be 3% that of the Moon, with about 60% contained in the four largest asteroids: Ceres, Vesta, Pallas, and Hygiea. Classes of small Solar System bodies in other regions are the near-Earth objects, the centaurs, trojans, and the trans-Neptunian…
True color image of Vesta taken by Dawn. The vast Rheasilvia Crater dominates Vesta's south pole.
True color image of Vesta taken by Dawn. The vast Rheasilvia Crater dominates Vesta's south pole.
Vesta, Ceres, and the Moon with sizes shown to scale
Vesta, Ceres, and the Moon with sizes shown to scale
SPHERE image is shown on the left, with a synthetic view derived from Dawn images shown on the right for comparison.
SPHERE image is shown on the left, with a synthetic view derived from Dawn images shown on the right for comparison.
Claudia crater (indicated by the arrow at the bottom of the closeup image at right) defines the prime meridian in the Dawn/NASA coordinate system.
Claudia crater (indicated by the arrow at the bottom of the closeup image at right) defines the prime meridian in the Dawn/NASA coordinate system.