A 'mass migration' of stars from the Milky Way's center could explain why there's life in our solar system
Researchers analyzed 6,594 solar twins using Gaia data and found a mass migration of stars including the Sun from the Milky Way's center 4 to 6 billion years ago.
- On March 12, 2026, researchers reported that the Sun and solar twins underwent a coordinated outward migration from the Milky Way's center about 4 billion to 6 billion years ago.
- When the central bar formed, it likely triggered both starbirth and outward motion, as the Milky Way's central bar took shape about 4 billion to 6 billion years ago, matching the solar twins' migration.
- Using Gaia data, the team assembled an unprecedented catalog of 6,594 solar twins within about 1,000 light-years and found an age distribution peak between 4 and 6 billion years after selection-bias corrections.
- This migration history reframes theories about how and where life-friendly conditions arose, as Taniguchi said, 'The inner regions of the Milky Way are thought to be more hostile environments for life, with energetic events such as supernova explosions occurring more frequently'.
- Yet current models show the central bar's corotation barrier would block such movement, while computer simulations estimate only about 1 percent could breach the barrier, a tension the team will probe further.
24 Articles
24 Articles
Sun May Have Escaped Milky Way’s Crowded Core Billions of Years Ago
Using a vast catalog of Sun-like stars built by ESA’s Gaia mission, astronomers have found strong evidence that our home star traveled outward with thousands of stellar counterparts roughly 4 to 6 billion years ago, offering new clues to the formation of the Milky Way’s central bar. The post Sun May Have Escaped Milky Way’s Crowded Core Billions of Years Ago appeared first on Sci.News: Breaking Science News.
Our Sun Escaped the Milky Way’s Center With Its Stellar ‘Twins’, New Study Reveals
scientists have uncovered compelling evidence that our sun was part of a mass migration of stellar “twins” that left the center of the Milky Way billions of years ago. This remarkable journey, revealed through the most detailed catalog of similar stars to date, transforms our understanding of the solar system’s origins. Published in two papers in Astronomy and Astrophysics, this research not only traces the sun’s stellar migration but also offer…
Our sun might be a migrant from the inner Milky Way
A new study suggests our sun might be a migrant from a more central region of our home galaxy, the Milky Way. It suggests our sun joined a migration of other stars, which moved outward from the inner part of the galaxy some 4 to 6 billion years ago. Image via NAOJ/ EurekaAlert. Astronomers suggest the sun might have migrated from near the central bar-shaped nucleus of our Milky Way galaxy. Scientists studied 6,594 solar “twin” stars, using Gaia…
See what researchers discovered by studying data from the European Space Agency's Gaia satellite
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