00:04Scientists have thought for a while that there was just a bit too much light surrounding our
00:07solar system, but now they might finally have a guess as to why. A new study of around 200,000
00:12images captured by the Hubble Space Telescope has revealed there is in fact a glow around our home
00:17system, something they're calling ghost light. Too much to account for stars, so what is it?
00:22Their current leading theory is that it isn't light from outside the solar system, but rather
00:26from within it, and that light is reflecting off of cosmic dust. Recently, the New Horizons probe
00:31detected the light as well, as it passed Pluto and turned its sights back on our solar system,
00:35but the measurements from New Horizons differed somewhat. Here's how astronomer Tim Carleton
00:39explains it. Because our measurement of residual light is higher than New Horizons, we think it
00:44is a local phenomenon that is not from far outside the solar system. Adding, if our analysis is correct,
00:49there's another dust component between us and the distance where New Horizons made measurements.
00:53That means this is some kind of extra light coming from inside our solar system, which is actually
00:58pretty exciting news, as it means there is something rather nearby us, something that might be floating
01:02all around that we still have yet to discover.
