Its polished surface leads her to believe it got a lot of use and was very dear to someone, she said, adding that interestingly, the ring and dot motif had been found on spinning tools from the much earlier Iron age.
Beyond the cloud's unusual shape, scientists see the nebula as a freeze-frame in the life of a star facing its final act. Elderly stars shed their outer layers in bursts, creating shells of gas and dust that expand. By observing the nebula at different wavelengths, researchers can sort out what material was molted first, how fast the star is losing mass, and which phase of decline Webb has caught.
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The Future Trajectory of AI Search。业内人士推荐51吃瓜作为进阶阅读