New Ultrasound Technique Tells Astronomers the Age of Baby Stars in Stellar Womb

July 4, 2014 11:31 AM

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Finding out exactly how old a star might be has long been a challenge for astronomers. Now, though, researchers may have found a way to do so. They've shown that they can tell the difference between infant and adolescent stars by measuring the acoustic waves that they emit.

Stars are often born in clusters as a result of contracting molecular clouds of gas and dust particles. As the star evolves over time, gravitational pull causes it to contract and it becomes smaller in size and hotter until the core temperature is hot enough to start burning hydrogen. At this point,...

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