This image, taken with the NASA/ESA Hubble Space Telescope, depicts a special class of star-forming nursery known as Free-floating Evaporating Gaseous Globules, or frEGGs for short. This object is formally known as J025157.5+600606.

When a massive new star starts to shine while still within the cool molecular gas cloud from which it formed, its energetic radiation can ionize the cloud’s hydrogen and create a large, hot bubble of ionized gas. Amazingly, located within this bubble of hot gas around a nearby massive star are the frEGGs: dark compact globules of dust and gas, some of which are giving birth to low-mass stars. The boundary between the cool, dusty frEGG and the hot gas bubble is seen as the glowing purple/blue edges in this fascinating image.

Text credit: ESA (European Space Agency)
Image credit: ESA/Hubble & NASA, R. Sahai

这张图片是用NASA/ESA哈勃太空望远镜拍摄的,描绘了一类特殊的恒星形成的苗圃,称为自由漂浮蒸发气态小球,简称frEGG。该对象的正式名称为J025157.5 + 600606。

当一颗巨的新恒星在形成它的冷分子气中开始发光时,它的高能辐射可以使云中的氢电离,并产生一个大的、热的电离气体气泡。令人惊讶的是,位于附近一颗大质量恒星周围的热气体气泡中的是frEGGs:由尘埃和气体组成的黑色致密球体,其中一些正在孕育低质量的恒星。在这张迷人的图片中,凉爽多尘的喷流星云和炽热的气体气泡之间的边界被视为发光的紫色/蓝色边缘

文字来源:ESA (European Space Agency)
影像来源:ESA/Hubble & NASA, R. Sahai

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