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地球上最“高龄”固体物质约70亿岁
source link: https://tech.sina.com.cn/d/s/2020-01-16/doc-iihnzahk4423079.shtml
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来源：科技日报科技日报北京1月15日电 （记者刘霞）据物理学家组织网近日报道，美国科学家在陨石中发现了地球上已知最“高龄”固体物质——约50亿至70亿年前形成的星尘。这些星尘比太阳还要古老，有望向我们揭示银河系中恒星形成的奥秘。恒
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