Near-Earth Object, Small Solar System Body, Centaur (Minor Planet), Kuiper Belt
Serv
(2011-08-26
)
有获得代金券的资格
ISBN-13:
978-613-7-97775-0
ISBN-10:
6137977757
EAN:
9786137977750
书籍语言:
英文
作品简介:
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. 6015 Paularego (provisional designation: 1991 PR10) is a main-belt minor planet. It was discovered by Henry E. Holt at the Palomar Observatory in San Diego County, California, on August 7, 1991. It is named after Paula Rego, a Portuguese painter. Asteroids (from Greek ἀστήρ 'star' and εἶδος 'like, in form') are a class of small Solar System bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones. These terms have historically been applied to any astronomical object orbiting the Sun that did not show the disk of a planet and was not observed to have the characteristics of an active comet, but as small objects in the outer Solar System were discovered, their volatile-based surfaces were found to more closely resemble comets, and so were often distinguished from traditional asteroids.