It's not yet clear why researchers decided to point Webb in its direction, but little is known about the nebula, including the mass of the star creating it. That matters because a more massive star could eventually explode as a supernova, while a smaller, sun-like star would keep shrugging off layers of material until only a dense core remains and cools over time.
Medics are often expected to work night shifts, weekends and longer hours, for which they receive extra payments.
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与其说是技术问题,不如说是一个被长期忽视的基础工程问题。
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