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Hace 49 minutos · t. e. The cosmic microwave background ( CMB or CMBR) is microwave radiation that fills all space in the observable universe. It is a remnant that provides an important source of data on the primordial universe. [1] With a standard optical telescope, the background space between stars and galaxies is almost completely dark.
Hace 1 día · Manganese is part of the iron group of elements, which are thought to be synthesized in large stars shortly before the supernova explosion. 53 Mn decays to 53 Cr with a half-life of 3.7 million years. Because of its relatively short half-life, 53 Mn is relatively rare, produced by cosmic rays impact on iron.
