planetary nebula
This gallery shows four planetary nebulas from the first systematic survey of such objects in the solar neighborhood made with NASA's Chandra ...,The following is an incomplete list of known planetary nebulae. Contents. 1 Northern Hemisphere; 2 Southern Hemisphere; 3 See also; 4 References. Northern ... ,A planetary nebula is an astronomical object consisting of a glowing shell of gas and plasma formed by certain types of stars at the end of their lives. They are in ... ,A planetary nebula is a nebula that is made up of gas and plasma. They are made by certain types of stars later in their life. They look like planets through small ... ,A planetary nebula, abbreviated as PN or plural PNe, is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red ... ,Planetary nebula, any of a class of bright nebulae that are expanding shells of luminous gas expelled by dying stars. Observed telescopically, they have a ... , In about 5 billion years, when the sun shucks off its outer layers, it will create a beautiful shell of diffuse gas known as a planetary nebula. About ...,Planetary nebulae (PNe) are shells of gas and dust that have been ejected from a star during the process of its evolution from a hydrogen-burning main ... ,A planetary nebula is created when a star blows off its outer layers after it has run out of fuel to burn. These outer layers of gas expand into space, forming a ... ,行星狀星雲是恆星演化至老年的紅巨星末期，氣體殼層向外膨脹並被電離，形成擴大中的發射星雲，經常以英文的縮寫「PN」或複數的「PNe」來表示。「行星狀星雲」這個 ...
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 planetary nebula 相關參考資料
A Planetary Nebula Gallery - NASA
This gallery shows four planetary nebulas from the first systematic survey of such objects in the solar neighborhood made with NASA's Chandra ... https://www.nasa.gov List of planetary nebulae - Wikipedia
The following is an incomplete list of known planetary nebulae. Contents. 1 Northern Hemisphere; 2 Southern Hemisphere; 3 See also; 4 References. Northern ... https://en.wikipedia.org Planetary nebula - ScienceDaily
A planetary nebula is an astronomical object consisting of a glowing shell of gas and plasma formed by certain types of stars at the end of their lives. They are in ... https://www.sciencedaily.com Planetary nebula - Simple English Wikipedia, the free ...
A planetary nebula is a nebula that is made up of gas and plasma. They are made by certain types of stars later in their life. They look like planets through small ... https://simple.wikipedia.org Planetary nebula - Wikipedia
A planetary nebula, abbreviated as PN or plural PNe, is a type of emission nebula consisting of an expanding, glowing shell of ionized gas ejected from red ... https://en.wikipedia.org Planetary nebula | astronomy | Britannica
Planetary nebula, any of a class of bright nebulae that are expanding shells of luminous gas expelled by dying stars. Observed telescopically, they have a ... https://www.britannica.com Planetary Nebula: Gas and Dust | Space
In about 5 billion years, when the sun shucks off its outer layers, it will create a beautiful shell of diffuse gas known as a planetary nebula. About ... https://www.space.com Planetary Nebulae | www.cfa.harvard.edu
Planetary nebulae (PNe) are shells of gas and dust that have been ejected from a star during the process of its evolution from a hydrogen-burning main ... https://www.cfa.harvard.edu What is a planetary nebula? | Cool Cosmos
A planetary nebula is created when a star blows off its outer layers after it has run out of fuel to burn. These outer layers of gas expand into space, forming a ... http://coolcosmos.ipac.caltech 行星状星云- 维基百科，自由的百科全书
行星狀星雲是恆星演化至老年的紅巨星末期，氣體殼層向外膨脹並被電離，形成擴大中的發射星雲，經常以英文的縮寫「PN」或複數的「PNe」來表示。「行星狀星雲」這個 ... https://zh.wikipedia.org |