... of the planets; numerous comets , asteroids , and meteoroids; and the interplanetary ... the satellites of the planets and the asteroids revolve around the Sun in the same ...
... On 15 July 1972, Pioneer entered the Asteroid Belt, a doughnut shaped area which ... After safely traversing the Asteroid Belt, Pioneer 10 headed toward Jupiter. ... After safe passage through the asteroid belt on 19 April 1974, the Pioneer 11 ...
... structures formed when a large meteoroid , asteroid or comet smashes into a planet ... Most researchers now believe that a large asteroid or comet hit the Earth at the end ...
... asteroid Hidalgo, into two groups of inner and outer bodies: Group I: Mercury Venus ... 5 comets and 15 asteroids, including Chiron, the most distant asteroid known when it ...
... Many scientists believe that some asteroids are extinct comet nuclei, comets that have lost all of their volatiles. ... Asteroids Meteorites .. ...
... Tozzi, G. P. & Festou, M. C. 1990, Asteroids, Comets, Meteors III Vectorial Model ... C., & Festou, Michel C. 1992, Asteroids, Comets, Meteors 1991 Heliocentric distance ...
... Asteroids are assigned a serial number when they are discovered; it has no particular meaning except that asteroid N+1 was discovered after asteroid N. astronomical unit (AU) . ...
... made encounters with asteroid 951 Gaspra on October 29, 1991, and asteroid 243 Ida ... Asteroid Orbiter - 805 Kg - (February 17, 1996) The main scientific purpose of NEAR ...