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- The result is called, somewhat misleadingly, a planetary nebula. 这个结果称为行星状星云,这是个常让人误解的名字。
- Planetary nebulae are not as airy and tranquil as their images suggest. 行星状星云并不如影像中所显现的那麽飘逸宁静。
- This fraction matches the fraction of planetary nebulae that are bipolar. 这个比例符合双极星云在行星状星云中所占的比例。
- Many objections can be raised to this picture of planetary nebula formation. 形成行星状星云的这一图象可能会引起许多异议。
- In just two months the ACS has already done more than open a new set of eyes to the beautiful world of galaxies and planetary nebulae that peivade our galactic neighborhood. 美国化学学会在两个月里远远不止为美丽的星系世界及其弥漫于其中的行星星云打开了一系列观察的眼睛。
- Planetary nebulae are a type of isolated gaseous nebulae possessing a fair degree of bilateral symmetry. 行星状星云是一类孤立的气体星云,具有相当程度的双侧对称性。
- Glowing in vibrant colors, planetary nebulae, such as this one, represent the death rattles of dying stars. 在跳跃的颜色中烁烁发光的行星状星云(就像上面这颗)向人们描绘出垂死恒星的最后色彩。
- Planetary nebulae were named, or rather misnamed, two centuries ago by English astronomer William Herschel. 两个世纪前,英国天文学家赫雪尔(WilliamHerschel)将此类云气命名(更恰当地说,应是误判)为行星状星云。
- Planetary nebulae have long been appreciated as a final phase in the life of a sun-like star. 这个行星状星云被认为是一颗类似太阳的恒星正处于生命的最后阶段。
- It will evolve into a cosmic butterfly - a spectacular planetary nebula in the starry sky. 不过,太阳的死亡绝不平淡,它会化为星空蝴蝶成为夜空中灿烂的行星状星云。
- The spectacular planetary nebula Helix Nebula is the death of a star disguised as a butterfly. 色彩斑斓的行星状星云螺旋星云,正是恒星死亡所化身的蝴蝶。
- Both are planetary nebulae, gaseous shrouds cast off by dying sunlike stars, and are similar in physical size, at a light-year or so across. 都是行星状星云,气体外壳都是由濒临死亡的恒星吹出,在物理大小上类似,涵盖大约一光年左右。
- BRUCE BALICK and ADAM FRANK have published dozen of papers, both observational and theoretical, on planetary nebulae and their precursor stars. 巴立克与佛朗克发表过数十篇与行星状星云和其恒星相关的观测及理论论文。
- The bipolar outflows from post-AGB stars eventually grow to form a Planetary nebula. 晚期AGB恒星的偶极外向流最终将演化为行星状星云。
- This image from the Hubble Space Telescope reveals the Cat's Eye Nebula to be one of the most complex planetary nebulae known. 这张由哈勃太空望远镜拍摄的影像,揭示了猫眼星云可能是已知行星状星云中最复杂的一个。
- Officially known as PN G75.5+1.7, the Soap Bubble is an example of a planetary nebula. 这个“肥皂泡”被正式命名为PN G75.;5+1
- This image from the Hubble Space Telescope reveals the Cat&squots Eye Nebula to be one of the most complex planetary nebulae known. 这张来自哈伯太空望远镜的影像,透露出猫眼星云是现知结构最复杂的行星状星云之一。
- Also like many planetary nebulae, NGC 6164 has been found to have an extensive, faint halo, revealed in this deep telescopic image of the region. 而且也和大部份的行星状星云一样,在这张此区域的望远镜深空影像中,NGC 6164也具有广大且昏暗的物质晕轮。
- The Hubble Space Telescope, with its superior imaging capability, has taken many beautiful pictures of planetary nebulae, showing their rich colors and remarkable shapes. 拥有卓越摄影效果的哈勃太空望远镜,曾拍出许多美丽的星云照片,将其丰富色彩和奇特形状表露无遗。
- Caption:: Cataloged as NGC6543, a dying Sun-like star ejected its outer gaseous layers into concentric shells as a planetary nebula. 编号为NGC6543的行星状星云,由类似太阳但接近死亡的恒星向外抛出的数个同心外层气壳所成。