Visit <a rel="nofollow" class="external free" href="http://science.nasa.gov/">http://science.nasa.gov/</a> for more.
When the Space Age began, explorers were eager to visit the planets of the solar system. As the years have passed, however, astronomers have realized that the moons of the solar system may be even more interesting.
<a rel="nofollow" class="external text" href="https://www.youtube.com/user/ScienceAtNASA">ScienceAtNASA</a>
CC BY 3.0
<bdo lang="en" dir="ltr"><a href="//commons.wikimedia.org/wiki/Commons:YouTube_files" title="Commons:YouTube files">YouTube</a>: <a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=CQjZf2bW9XQ"><bdi lang="">ScienceCasts: Amazing Moons</bdi></a> – View/save archived versions on <a rel="nofollow" class="external text" href="https://web.archive.org/web/*/https://www.youtube.com/watch?v=CQjZf2bW9XQ">archive.org</a> and <a rel="nofollow" class="external text" href="https://archive.today/https://www.youtube.com/watch?v=CQjZf2bW9XQ">archive.today</a></bdo>