1.【天】星云
2.【医】角膜翳
1.[Astronomy]a very large cloud of dust and gas that exists in outer space
2.[Medical & Healthcare]a faint cloudy area or scar on the cornea of the eye
1.Hubble said the light that appeared to come from nebulae really came from stars near the nebulae.
哈勃说，那些看似来自星云的光实际上是由星云附近的星发出的。
2.Explanation: One of the most identifiable nebulae in the sky, the Horsehead Nebula in Orion, is part of a large, dark, molecular cloud.
解说：这是天空中最易辨认的星云之一。猎户中的马头星云是一个巨大的黑暗分子云的一部分。
3.l Nebula (plural nebulae) was the word once used for and fuzzy patch of light in the night sky.
l星云这个名称，过去曾经用来泛指夜空中那些发亮的小块区域。
4.One of the most notable of these dark absorption nebulae is a cloud toward the constellation Ophiuchus known as Barnard 68, pictured above.
这类暗吸收星云里最著名的一个就是蛇夫座的巴纳德68，如上图所示。
5.The element hydrogen comprises 90% of the matter in gaseous nebulae.
元素氢占气体星云物质的百分之九十。
6.An image released by NASA shows the Heart and Soul nebulae in an infrared mosaic from the Wide-field Infrared Survey Explorer, or WISE.
美国宇航局发表的这个图像显示了广视野红外勘测探测器WISE拍摄的心与灵星云（HeartandSoul）红外马赛克。
7.The nebulae, he said, were clouds of atoms and dust. They were not hot enough -- like stars-- to give off light.
他说，星云是由原子和尘埃形成的云。他们不像星星那么热，不能发光。
8.Explanation: Bright nebulae abound in and around the expansive southern constellation of Centaurus .
说明：明亮的星云围绕在广阔的南方人马座周围。
9.The name originates from the 18th century, when telescopes weren't powerful enough to distinguish nebulae from gas giant planets.
这个名字源于18世纪，当时望远镜威力还不够强大，无法区分星云和气态巨行星。
10.This Hubble Space Telescope image reveals "The Cat's Eye Nebula" to be one of the most complex "planetary nebulae" known.
哈勃望远镜拍到的这张“猫眼状星云”是当前所知最复杂的“行星星云”之一。