| In this study, the researchers focused on distinctive galaxies called blazars, which are several billion light years away. |
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| These blazars emit gamma rays, but not all of them reach Earth. |
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| From blazars to thunderstorms, from dark matter to supernova remnants, catch the highlights of NASA Fermi's first five years in space. |
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| It's already found hundreds of massive black holes known as blazars and has imaged the coldest known stars in the universe. |
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| The extreme brightness and variability of blazars result from a chance orientation that brings one jet almost directly in line with Earth. |
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| Since its 1991 launch aboard a shuttle, the Compton Observatory has detected 50 blazars. |
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| Blazars have been spotted throughout the sky, but researchers don't know how their jets form. |
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| Astrophysicist Marco Ajello of Stanford and his colleagues used the orbiting Fermi Large Area Telescope to study distant blazars, a type of bright, active galaxy. |
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| The fastest ' things' i n the Universe are blobs of superheated plasma that are ejected from black holes that are in the cores of extremely active galaxies known as blazars. |
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