天文學家發現宇宙中最古老的恆星之一
Astronomers discover one of the universe's oldest stars
2026年4月，天文學家有了開創性的發現：一顆名為SDSS J0715−7334的恆星。
In April 2026, astronomers made a groundbreaking discovery: a star named SDSS J0715−7334.
這顆位於8萬光年外的天體，是迄今觀察到化學成分最原始的恆星。
This celestial body, located 80,000 light-years away, is the most chemically pristine star ever observed.
對科學家而言，這顆恆星就像是一份宇宙出生證明。
To scientists, this star acts as a cosmic birth certificate.
透過研究低金屬豐度的恆星，研究人員能更好地理解大霹靂後不久存在的第一代恆星。
By studying stars with low metallicity, researchers can better understand the first generation of stars that existed shortly after the Big Bang.
例如，著名的「瑪土撒拉」(ㄇㄚˇㄊㄨˇㄙㄚㄌㄚ)恆星過去曾在更好的技術校準其年齡之前，挑戰了我們對宇宙時間軸的認知。
For instance, the famous "Methuselah" star previously challenged our understanding of the universe's timeline before better technology refined its age.
與距離地球較近的瑪土撒拉恆星不同，SDSS J0715−7334很可能是一名銀河系移民，在加入我們銀河系之前便已在銀河系外形成。
Unlike the Methuselah star, which resides closer to Earth, SDSS J0715−7334 is likely a galactic immigrant, having formed outside the Milky Way before joining our galaxy.
隨著我們的工具（例如歐洲太空總署的蓋亞任務）變得更加先進，我們透過在銀河系暈中尋找這些古老的遺跡，持續拼湊出宇宙的歷史。
As our tools, such as the European Space Agency’s Gaia mission, become more advanced, we continue to piece together the history of our universe by finding these ancient relics hidden in the galactic halo.
