美国宇航局的哈勃太空望远镜揭示了一个令人惊讶的新细节,关于一个神秘的, 930亿英里长的黑暗,蓬松的尘埃云,可能是在巨大的行星体碰撞时形成的。NASA's Hubble Space Telescope has revealed surprising new details about a mysterious, 93-billion-mile-long cloud of dark, fluffy dust that may have formed when massive planetary bodies collided. The discovery challenges