英语释义

• a nebula that was once thought to be a star with its planets but is now thought to be a very hot star surrounded by an expanding envelope of ionized gases that emit a fluorescent glow because of intense radiation from the star

片语

Blinking Planetary Nebula英语

The Rotten Egg Planetary Nebula行星状星云

pre-planetary nebula前行星状星云

bipolar r planetary nebula双极行星状星云

proto-planetary nebula原行星云

Planetary nebula luminosity functionPlanetary nebula luminosity function (PNLF) is a secondary distance indicator used in astronomy. It makes use of the [O?III] λ5007 forbidden line found in all planetary nebula which are members of the old stellar populations (Population II).

Blue Planetary Nebula英语

bipolar planetary nebula双极行星状星云

英汉例句

• Our own sun will blossom into a planetary nebula when it dies in about five billion years.

  大约50亿年后，我们的太阳死去时，也会变成行星状星云。

• NGC 5189 is a planetary nebula with an oriental twist. Similar in appearance to a Chinese dragon, these red and green cosmic fireworks are the last swansong of a dying star.

  NGC 5189是个行星状星云，它是一颗恒星垂死前的最后表演，它具有少见的东方神物——中国龙的外形。

• Also known as Abell 21, this Medusa is an old planetary nebula some 1, 500 light-years away in the constellation Gemini.

  也被称作阿贝尔21，水母星云是双子座中一个1500光年远的年老行星状星云。

• As for the spiral itself, current supposition is that this is the result of a star in a binary star system entering the planetary nebula phase, when its outer atmosphere is ejected.

  至于螺旋本身，最近的推测是这是双子星系统中的一个恒星进入行星星云阶段的结果，此时它的外层大气会被喷出。

• Of course, gazing into the Cat「s Eye, astronomers may well be seeing the fate of our sun, destined to enter its own planetary nebula phase of evolution ...

  当然，天文学家在观察「猫眼」时，就可能也看到了我们的太阳的命运，它最终注定会进入行星星云的演化阶段……

• Shining with light from the central star reflected by dust, the frigid Boomerang Nebula is believed to be a star or stellar system evolving toward the planetary nebula phase.

  冰寒的回飞棒星云会发光，是因为它尘埃反射了来自中心星的星光，天文学家认为它是正在演化到行星状星云阶段的恒星或恒星系统。

• A second image shows a nearby dying star — a planetary nebula called NGC 4361 - which has outer layers that expand outward in the rare form of four jets.

  第二张照片显示了附近一个频临死亡的恒星——一个名为ngc 4361的行星状星云——其外部几层以四处喷射的罕见形式向外膨胀。

• The white dwarf star at the center of this planetary nebula may be accompanied by a second-generation world, formed from the debris of the dying star」s original planets.

  位于这团行星状星云中心的白矮星可能伴有一颗第二代行星。这颗濒临死亡的恒星将原有行星撕成碎块，第二代行星形成于这些碎块。

• In tribute to Hubble「s longest-running optical camera, a planetary nebula has been imaged as WFPC2」s final 「pretty picture.」

  这个行星状星云的照片被看成是WFPC2最后的「漂亮图片」，以向这个哈勃历史最悠久的光学相机表示敬意。

• While the planetary nebula phase is thought to last for around 10, 000 years, astronomers estimate the age of the outer filamentary portions of this halo to be 50, 000 to 90, 000 years.

  虽然行星状星云阶段持续约1万年，天文学家估计其外晕的丝状物质年龄在5万至9万年间。

• A planetary nebula is an expanding cloud of gas ejected from a star that is nearing the end of its life.

  行星状星云一个由来自中心濒临死亡恒星所释放出的气体组成的正在膨胀的星云。