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
Extragalactic background light fundamental for extragalactic very-high-energy (VHE, 30 GeV-30 TeV) astronomy. VHE photons coming from cosmological distances are attenuated by pair production with EBL photons. This interaction is dependent on the spectral energy distribution (SED) of the EBL. Therefore, it is necessary to know the SED of the EBL in order to study intrinsic properties of the emission in the VHE sources. The direct measurement of the EBL is a difficult task mainly due to the contribution of zodiacal light that is orders of magnitude higher than the EBL. Different groups have claimed the detection of the EBL in the optical and