Scientists have identified a vast cosmic bubble—1,000 light years across—around the Sun as a source of baby stars
Astronomers have known since the 1970s that our sun lies at the center of a vast cavity within the hot gas that fills the gaps between stars in the Milky Way. But the origins of that ever-growing void, known as the Local Bubble, and its relationship to our starry neighbors remained elusive.
Now, using new data from the European Space Agency’s Gaia space telescope, scientists have revealed that the genesis and growth of that bubble were due to a series of 15 supernovas— —over the past 14 million years, and that every young star and star-forming region within 500 light years of Earth sits on the Local Bubble’s surface.
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