Extragalactic planet This suspected planet is the first announced in the Andromeda Galaxy. A population of unbound planets between stars, with masses ranging from Lunar to Jovian masses, have been indirectly detected, for the first time, by astrophysicists from the University of Oklahoma, in the lensing galaxy that lenses quasar RX J1131-1231 by microlensing. Extragalactic planet An extragalactic planet, also known as an extragalactic exoplanet, is a star-bound planet, or rogue planet, located outside of the Milky Way galaxy. Due to the huge distances to such worlds, they would be very hard to detect directly. However, indirect evidence suggests that such planets
Diffuse extragalactic background radiation Diffuse extragalactic background radiation The diffuse extragalactic background radiation (DEBRA) refers to the diffuse photon field from extragalactic origin that fills our Universe. It contains photons over ∼ 20 decades of energy from ~10 eV to ~100 GeV. The origin and the physical processes involved are different within every wavelength range. There are plenty of observational evidences that support the existence of the DEBRA. The figure shows a schematic picture, based on many different data sets, of the spectral intensity (also called spectral radiance) multiplied by wavelength of the DEBRA over all the electromagnetic spectrum. This representation is convenient because