Herschel observatory's population of trans-Neptunian objects
Tuesday, June 10, 2014 - 05:01
in Astronomy & Space
(Phys.org) —ESA's Herschel space observatory has observed 132 of the known 1400 cold worlds that inhabit a region of the Solar System beyond the orbit of Neptune, some 4.5–7.5 billion km from the Sun.