The Curiosity rover, which is designed to explore Mars, has found an ancient oasis on Mars. Researchers working with the Curiosity rover have found salt-enriched…
According to scientists the powerful jets of radio waves that can explode from monster black holes at the center of galaxies may erupt from much closer to these giants than previously thought. Although black holes entrap anything that falls onto them, a vast amount of energy can radiate outward from matter rushing into the black holes. In this way, radio telescopes can spot black holes by the radio jets they can give off. Scientists studied the black hole at the heart of galaxy M87, a monster about 23.5 billion miles (37.8 billion kilometers) wide and 6 billion times the mass of the sun.
Using multifrequency radio observations from the Very Long Baseline Array, a collection of radio antennas located at 10 sites from the Virgin Islands to Hawaii, the investigators saw its radio jet was broad between the black hole and the radio jet’s brightest part, its core. Scientists found the radio jet’s core lay within a hundredth of a light year of the black hole. This is hundreds to thousands of times closer than estimates of the distance between radio jet cores and black holes in objects called blazars, more-luminous cousins of M87. The radio jet core might seem much closer to the black hole in M87 than in blazars for a number of reasons.
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