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 Alps are also additional minor differences between the two book versions of the poem. For instance, "Life changed to landscape" becomes "Man changed to landscape." Lowell also made minor changes in punctuation. The editors of the "Collected Poems" note that Lowell's poem "Ovid and Caesar's Daughter," from his book "History", "is a revision of stanza three [from the version of "Beyond the Alps" in "For the Union Dead"". Lowell refers to: Beyond the Alps "Beyond the Alps" is a poem by Robert Lowell. According to Saskia Hamilton, the editor of Lowell's "Letters", Lowell wrote the original version of the poem in