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Earth Is Surrounded by a 1,000-Light-Year-Wide Bubble That Cooks Up Stars - Gizmodo
Jan 12, 2022 48 secs

Called the Local Bubble, the researchers believe it formed from a series of large explosions that blasted energy into space over the last 14 million years.

“We find that all nearby, young stars formed as powerful supernova explosions triggered an expanding shockwave, sweeping up interstellar clouds of gas and dust into a cold dense shell that now forms the surface of the Local Bubble,” said study co-author Catherine Zucker in an email to Gizmodo.

“Astronomers have theorized for many decades that supernovae can ‘sweep up’ gas into dense clouds that ultimately form new stars, but our work provides the strongest observational evidence to date in support of this theory,” added Zucker, an astronomer at the Center for Astrophysics | Harvard & Smithsonian.

That’s because, unlike the stars on the Local Bubble’s periphery, our solar system was born much longer ago than the last 14 million years.

“When the Local Bubble first started forming, the Earth was over 1,000 light-years away,” Zucker said.

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