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 cutest Pokémon in the bunch, this 587-piece Lego set builds out to an adorable 7.5-inch tall Eevee. With a movable tail, head, and limbs, builders can pose the fan-favorite in two ways: at rest or ready to jump into action. The most modestly priced of the sets, it retails for $59.99 and is officially live at Lego.com.。业内人士推荐夫子作为进阶阅读
英國超市將巧克力鎖進防盜盒阻止「訂單式」偷竊