Different Worlds Different Worlds from Cassini spacecraft.비슷하지만 매우 다른 세계를 가진 토성의 위성 테티스와 야누스. http://www.nasa.gov/image-feature/jpl/pia18356/different-worlds Although Tethys and Janus both orbit Saturn and are both made of more or less the same materials, they are very different worlds. Their contrasts are related, in large part, to their sizes. Tethys (660 miles or 1,062 kilometers across) is large enough to be.. 2016. 3. 6. 이전 1 다음