Submitted by admin on Mon, 04/14/2014 - 00:38
definition:
A small rocky body orbiting the sun. Large numbers of these, ranging enormously in size, are found between the orbits of Mars and Jupiter, though some have more eccentric orbits
sentence:
Ceres was initially considered to be a planet until other asteroids with similar orbits were found.
difficulty:
medium
toefl frequency:
3
toefl classification: