Extragalactic cosmic ray Extragalactic cosmic ray Extragalactic cosmic rays are very-high-energy particles that flow into the Solar System from beyond the Milky Way galaxy. The energies these particles possess are in excess of 10 eV. Unlike solar or galactic cosmic rays, little is known about the origins of extragalactic cosmic rays. This is largely due to a lack of statistics: only about 1 extragalactic cosmic ray particle per square meter per year reaches the Earth's surface (see figure). There are many ideas about which processes may be responsible for cosmic rays with such high energies. In the 'bottom-up' approach, cosmic rays gain more
The Hills Beyond The Hills Beyond The Hills Beyond is a novel by Thomas Wolfe, published posthumously in 1941. Like his earlier novels "The Web and the Rock" and "You Can't Go Home Again", it was extracted by Edward Aswell from a larger manuscript after Wolfe's death. "The Hills Beyond" is usually considered a novel or unfinished novel, but has also been described as a collection of sketches, stories, and novellas. The Hills Beyond was created by Aswell mainly by taking a group of chapters cut from the beginning of Wolfe's original epic manuscript, and attaching sketches cut from various sources. The book