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Planetary nebula

en.wikipedia.org/wiki/Planetary_nebula

Eventually, after most of the red giant's atmosphere is dissipated, the exposed hot , luminous core emits ultraviolet radiation to ionize the ejected outer layers of the star. .... This led to th...

Stars - Main Sequence - aspire

aspire.cosmic-ray.org/Labs/StarLife/starlife_equilibrium.html

There are essentially two sections of a star: the core (where fusion occurs), and an outer gaseous ... What happens to a star after the main sequence phase?

Planetary Nebulae and White Dwarfs - e-Education Institute

www.e-education.psu.edu/astro801/content/l6_p4.html

Given our observations of planetary nebulae (described in more detail below) ... The core of the star is no longer undergoing nuclear fusion of any variety, so it is  ...

Page 1 @ Helium-burning supergiant: Helium fusion begins when ...

astro.swarthmore.edu/astro1/reading/Bennett_Ch17_pt2.pdf

layers in a planetary nebula, leaving behind the exposed inert core. 10,000 years ... occurs when the giant grows so large that its tidally distorted outer layers .... What happens to a low-mass star after it exhausts its core helium? 17 Th _ I b1 ...

Stars and Nebulae - SkyServer

skyserver.sdss.org/dr1/en/astro/stars/stars.asp

In the core of the star, the temperature and densities are high enough to sustain .... The evolution from main sequence to red giant occurs at different times for different stars. ... At this point, what happens next depends on the mass of the star . ... layers into beautiful planetary nebulae, and leaving the core as a hot white dwarf.

Stellar Evolution: White Dwarfs

abyss.uoregon.edu/~js/ast122/lectures/lec17.html

As an asymptotic giant branch star becomes larger and more luminous, the rate at which is ... In the center of the planetary nebula is the remnant core. ... After a billion years the typical white dwarf is down to 0.001 the luminosity of the Sun.

Stellar Death - University of Oregon

abyss.uoregon.edu/~js/ast122/lectures/lec18.html

... this mass limit. An example of this is the Cat's Eye Nebula shown below: ... Even higher mass stars will burn neon after carbon is used up. ... Iron can fuse, but it absorbs energy in the process and the core temperature drops. ... This entire process happens so fast that we can only follow it using supercomputer simulations.

Formation of Planetary Nebulae - Cosmotography

www.cosmotography.com/images/planetary_nebula_formation.html

Peering down into a vast cosmic maelstrom of gas and dust, the central star in this image of NGC 6853, also known as the Dumbbell Nebula, produced ... Eventually, the core of the cloud becomes so squeezed by gravity that pressures ... When this happens, nuclear reactions will cease, the outward force of energy that has ...

Exam 2 - Physics 107 with Doyle at Bridgewater State University ...

www.studyblue.com/notes/note/n/exam-2/deck/10369229

Mar 15, 2014 ... What are the minimum and maximum masses for a star, and why do these ... What happens to the core of a star after a planetary nebula occurs.

Chapter 17 - Astronomy 103 with Lane at College of Staten Island ...

www.studyblue.com/notes/note/n/chapter-17/deck/14269451

Apr 3, 2015 ... Why does a star grow larger after it exhausts its core hydrogen? ... What happens to the core of a star after a planetary nebula occurs?

Helpful Resources

What happens to the core of a star after a planetary nebula occurs

www.answers.com

No, the term planetary nebula is very misleading and it has nothing to do with planets. A Planetary Nebula forms when stars up to 8 times the mass of our sun ...

What is a Planetary Nebula? | Planetary Nebula Definition

www.space.com

Sep 21, 2012 ... Planetary nebulae are the cloudy remnants of smaller stars that have ... The small core, a newly formed white dwarf, will illuminate those layers in a ... dust spread almost evenly after they were shucked off of their parent star.

Stage 8: Planetary Nebula or Supernova - Astronomy Notes

www.astronomynotes.com

Feb 17, 2015 ... Planetary nebulae can be distinguished from H II regions by their ... When a massive star's iron core implodes, the protons and electrons fuse ... This happens in about the first 15 minutes of the supernova. ... The images below show the star before it went supernova (right frame and arrow) and after the ...

Stellar Evolution

www.uni.edu

What happens to the Earth when the Sun starts to "die"? What is the ..... All that is left of the star after the Planetary Nebula stage is the hot little core. What is the ...

StarChild: Stars - Nasa

starchild.gsfc.nasa.gov

These clouds are called nebulae, and it is in a nebula where stars are born. In the ... As it glows, hydrogen is converted into helium in the core by nuclear fusion. ... This ring is called a planetary nebula. ... The core of a massive star that is 1.5 to 4 times as massive as our Sun ends up as a neutron star after the supernova.