With Earth-like planets being discovered in far off star systems and HD cameras roving about on Mars, it's easy to forget how much of our own solar system is still an unexplored frontier. It may not be a ground breaking discovery, but the fact that there are Moons we haven't found as of yet, is really exciting to me!
This little guy has a width less than the length of Manhattan, so I was surprised to hear it being called a moon.<p>But Wikipedia says there isn't really a lower limit to the size of a moon -- if it orbits a planet, it's a moon. Unless we put it there, in which case it's a satellite. <a href="http://en.wikipedia.org/wiki/Natural_satellite#The_definition_of_a_moon" rel="nofollow">http://en.wikipedia.org/wiki/Natural_satellite#The_definitio...</a>
<i>Many of the moons now seen orbiting the planet probably formed after Triton settled into its unusual retrograde orbit about Neptune.</i><p>Or they were captured out of the Kuiper Belt as well. Maybe Neptune keeps losing and capturing new moons, rotating rocks into and out of the Kuiper Belt.
Really cool.<p>Also possibly of interest: <a href="http://en.wikipedia.org/wiki/Moons_of_Pluto" rel="nofollow">http://en.wikipedia.org/wiki/Moons_of_Pluto</a><p>I had no idea Pluto (not a planet) had five moons.