Sentences with phrase «energetic objects known»
In the early universe, galaxies collided relatively often and their black holes sometimes merged, growing more massive in the process and sometimes birthing hugely energetic objects known as quasars.
http://www.sciencemag.org/ Not exact matches
Such a crust could have formed as energetic particles known as cosmic rays bombarded the object over its lifetime, creating an ice - free surface rich in organic compounds.
In fact, 1156 +295 is one of a class of objects recently found by NASA's Compton Gamma - Ray Observatory to exhibit powerful gamma - ray emission; such objects are among the most compact and energetic known in the universe.