WISPIT 2b：系外行星在诞生盘上刻出缺口
(原标题: WISPIT 2b: Exoplanet Carves Gap in Birth Disk)
2025-08-27
浏览次数: 1570
那个黄点，是什么？它是太阳系外的一颗年轻行星。这张来自智利甚大望远镜的特色图像令人惊讶地捕捉到了一个遥远的场景，就像我们太阳系的诞生一样，大约45亿年前。虽然我们不能回顾过去，直接看到地球的形成，但望远镜让我们看到了在遥远恒星周围展开的类似过程。在这幅画面的中心是一颗年轻的类似太阳的恒星，它隐藏在日冕仪后面，遮挡了它明亮的光芒。围绕这颗恒星的是一个明亮的、布满灰尘的原行星盘——行星的原材料。缝隙和同心圆标志着一个新生的世界在其重力下聚集气体和尘埃，为它绕恒星运行扫清了道路。虽然天文学家之前已经拍摄过圆盘嵌入行星的图像，但这是第一次观察到系外行星在圆盘内主动雕刻一个缺口——这是最早直接看到行星雕刻的行动。
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That yellow spot -- what is it? It's a young planet outside our Solar System. The featured image from the Very Large Telescope in Chile surprisingly captures a distant scene much like our own Solar System's birth, some 4.5 billion years ago. Although we can't look into the past and see Earth's formation directly, telescopes let us watch similar processes unfolding around distant stars. At the center of this frame lies a young Sun-like star, hidden behind a coronagraph that blocks its bright glare. Surrounding the star is a bright, dusty protoplanetary disk -- the raw material of planets. Gaps and concentric rings mark where a newborn world is gathering gas and dust under its gravity, clearing the way as it orbits the star. Although astronomers have imaged disk-embedded planets before, this is the first-ever observation of an exoplanet actively carving a gap within a disk -- the earliest direct glimpse of planetary sculpting in action.