A galaxy already known to have one ginormous black hole at its core is actually home to two of these cosmic giants, a new study reveals.
Astronomers discovered the second monster black hole at the center of the galaxy Markarian 739, which is about 425 million light-years from Earth, toward the constellation Leo. Its presence was revealed in observations by NASA's Swift satellite and the Chandra X-Ray Observatory.
The two black holes are separated by about 11,000 light-years, which is about one-third the distance between our solar system and the center of the Milky Way. One light-year is about 6 trillion miles.
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