Ancient Star With Five Earth Size Planets Discovered

Kepler-444 came from the first generation of stars. “This system tells us that planets were forming around stars nearly seven billion years before our own solar system,” Kawaler noted. Planetary systems around stars have been a common feature of our galaxy for a long, long time.

That discovery is going to help astronomers learn even more about the history of the Milky Way.

“From the first rocky exoplanets to the discovery of an Earth-size planet orbiting another star in its habitable zone, we are now getting first glimpses of the variety of Galactic environments conducive to the formation of these small worlds,” the astronomers wrote.

As a result, the path toward a more complete understanding of early planet formation in the Galaxy starts unfolding before us, they concluded in the paper that appeared in the Astrophysical Journal.

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