A new part of the universe has just been discovered.

quote from: http://www.sciencedaily.com/releases/2014/11/141106143723.htm
Using an experiment carried into space on a NASA suborbital rocket,
astronomers have detected a diffuse cosmic glow that appears to
represent more light than that produced by known galaxies in the
universe. The discovery suggests that many such previously undetected
stars permeate what had been thought to be dark spaces between galaxies,
forming an interconnected sea of stars.
end quote

The explanation advanced by the observers implies evaporation of stars
from galaxies, forming a halo around all galaxies.

Journal References:
M. Zemcov, J. Smidt, T. Arai, J. Bock, A. Cooray, Y. Gong, M. G. Kim, P.
Korngut, A. Lam, D. H. Lee, T. Matsumoto, S. Matsuura, U. W. Nam, G.
Roudier, K. Tsumura, T. Wada. On the origin of near-infrared
extragalactic background light anisotropy. Science, 2014; 346 (6210):
732 DOI: 10.1126/science.1258168
(Paywalled)

http://xxx.lanl.gov/pdf/1411.1411.pdf
(not paywalled)

How little we know about the cosmos really.