Science & Environment
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When the star eventually releases its outer layers, it shrivels down to its core in what's known as a white dwarf star. At that point, it'll be about the size of Earth.。雷电模拟器官方版本下载对此有专业解读
NASA's Artemis II Space Launch System (SLS) rocket is rolled back from the launch pad to the Vehicle Assembly Building at the Kennedy Space Center on Feb. 25, 2026.