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 cosmic ray many more possible sources scientists are considering. These include colliding galaxy systems, accretion flow shocks to clusters of galaxies, and more exotic processes from the very early universe, such as the decay of superheavy particles trapped in the galactic halo, or topological defects. Due to the very low flux of extragalactic cosmic particles received on Earth, little is known about their composition. Most estimates, based on theoretical and numerical models, predict that light atomic nuclei such as protons are the dominant particle type. Extragalactic cosmic ray Extragalactic cosmic rays are very-high-energy particles that flow into the Solar System from beyond