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
Beyond the Grave Beyond the Grave Beyond the Grave is the fourth book in "The 39 Clues" series first published in June 2, 2009 and written by Jude Watson. Thematically the novel uses Biblical knowledge, prophecy, and spiritual topics to explore the afterlife. Amy and Dan Cahill, the protagonists, travel to Egypt because of a clue they discovered in "The Sword Thief". The symbols in the middle of the book translate "Alistair was there the night they died." "Beyond the Grave" was awarded one of "Good Morning America" pick for teen summer reading. Amy and Dan head for Cairo, Egypt, with their au