NASA Greenbelt Scientists Discover Young Stars Dim Faster Than Expected

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Researchers at NASA's Goddard Space Flight Center in Greenbelt, Maryland have made a surprising discovery about young Sun-like stars. Using data from the Chandra X-ray Observatory and other sources, they found that these stars dramatically reduce their X-ray output much faster than previously thought - within a few hundred million years. This could have significant implications for the potential habitability of planets orbiting these stars.

Why it matters

The rate at which young stars calm their X-ray activity is an important factor in determining if nearby planets can support life. More rapid dimming of X-rays means the planets may become more hospitable for life to develop and thrive at an earlier stage in a star system's evolution.

The details

The NASA Goddard researchers analyzed data on the X-ray emissions of young Sun-like stars, which are typically very active in their early stages. They discovered that these stars' X-ray output drops off sharply within a few hundred million years, much faster than the previous estimate of a billion years. This rapid calming of stellar activity could create more favorable conditions for life to emerge on orbiting planets sooner than expected.

• The NASA Goddard researchers analyzed data from the Chandra X-ray Observatory and other sources.
• Their findings show young Sun-like stars dramatically reduce their X-ray output within a few hundred million years.