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Astronomers Measure the Long Reach of a Quasar

July 31, 2026
Astronomers Measure the Long Reach of a Quasar
By Carolyn Collins Petersen (https://ift.tt/GYQwCXf)

Schematic illustration of the hierarchical structure of the Universe, from a galaxy group (a collection of galaxies) to an individual galaxy and the supermassive black hole at its center. Although a black hole is more than 100 million times smaller than the radius of its host galaxy, it plays a crucial role in the galaxy's central region. ©Tohoku University

There are a number of things in the Universe that could wipe out life as we know it, but — for now, and for Earth — a blast from our galaxy's supermassive black hole isn't one of them. That's not to say that Sagittarius A* doesn't pose a danger. If it wakes up someday and blasts out a strong wind, that definitely could affect Earth. It could well have powered a quasar in the past, and could do so again.



July 31, 2026 at 11:13PM
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