26 Alは、半減期73万年でマグネシウムの安定同位体 26 Mgにベータ崩壊するため、形成から約46億年経った現在の太陽系では消滅している。一方で、太陽系の最初期に形成された隕石には地球岩石などの若い試料に比べて 26 ...

The charming but no-nonsense CEO of the Allegheny County Airport Authority is spearheading a revolution in air travel for the ...

Gov. Michelle Lujan Grisham delivers her seventh State of the State address. Reporter screenshot FROM THE OFFICE OF THE ...

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Astronomers have long tried to track down how elements like carbon, which is essential for life, become widely distributed across the universe. Now, NASA’s James Webb Space Telescope has examined one ...