Web Results

Planetary nebula

en.wikipedia.org/wiki/Planetary_nebula

This led to the idea that planetary nebulae were caused by a star's outer layers ... After a star passes through the asymptotic giant branch (AGB) phase, the ... and hydrogen fusion reactions oc...

What is a planetary nebula? What happens to the core - Course Hero

www.coursehero.com/file/p4jvk52/What-is-a-planetary-nebula-What-happens-to-the-core-of-a-star-after-a-planetary/

Planetary nebula is the glowing cloud of gas ejected from a low-mass star at the end of ... After exhausting its core helium, sun will expand and its radium will grow to ... Be sure to explain both the changes that occur in the Sun's core with each ...

Planetary Nebulae and White Dwarfs | Astronomy 801: Planets ...

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

When a star reaches the asymptotic giant branch (its second ascent up the red giant ... Given our observations of planetary nebulae (described in more detail ... no fusion is occurring, so the carbon/oxygen remnant of the stellar core will not ...

Stage 8: Planetary Nebula or Supernova - Astronomy Notes

www.astronomynotes.com/evolutn/s6.htm

Feb 17, 2015 ... For the common low-mass stars (those with masses of 0.08 to about 6 or 7 ... The ultraviolet from the hot exposed core, called a white dwarf, causes the gases to fluoresce. ... Planetary nebulae can be distinguished from H II regions by their ... This happens in about the first 15 minutes of the supernova.

Stellar Evolution

www.uni.edu/morgans/astro/course/Notes/section2/new8.html

What happens to the Earth when the Sun starts to "die"? What is .... When the core temperature reaches 100 million K, it is hot enough for helium fusion to occur. ..... All that is left of the star after the Planetary Nebula stage is the hot little core.

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

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

What happens to a low-mass star after it exhausts its core helium? ... after a planetary nebula occurs? because one day the Sun will blow up as a supernova. 9.

StarChild: Stars - Nasa

starchild.gsfc.nasa.gov/docs/StarChild/universe_level2/stars.html

These clouds are called nebulae, and it is in a nebula where stars are born. ... The collisions which occur between the hydrogen atoms starts to heat the gas in the ... As it glows, hydrogen is converted into helium in the core by nuclear fusion. ... to 4 times as massive as our Sun ends up as a neutron star after the supernova .

The Life of a Star

www.astro.keele.ac.uk/workx/starlife/StarpageS_26M.html

Stars are hot bodies of glowing gas that start their life in Nebulae. ... Stage 6 - The helium core now starts to contract further and reactions begin to occur in a shell ... a gaseous shell, this gas that surrounds the core is called a Planetary Nebula.

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?

Stars - Death of a star - Aspire

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

What happens to a star after the red-giant phase is not certain. We do know ... Low mass stars (0.08-5 SM during main sequence) will go the planetary nebula route. A low ... Carbon burning occurs when the helium in the core is gone. The core ...

Popular Q&A
Q: What happens to the core of a star after a planetary nebula occur...
A: After a planetary nebula occurs, the ejected gas disperses and the core cools to become a white dwarf. report this answer. Updated on Wednesday, February 01 201... Read More »
Source: www.kgbanswers.com
Q: What happens to the core of a star after a planetary nebula occur...
A: A is more or less the correct answer. The star does not have to be very low mass though. (Below 8 solar mass is enough) C is what happens next. Read More »
Source: answers.yahoo.com
Q: What happens to the core of a star after a planetary nebula occur...
A: It contracts from a protostar to a main-sequence star. B) It breaks apart in a violent explosion. C) It becomes a white dwarf. D) It becomes a neutron star. E) ... Read More »
Source: www.physics.sfasu.edu
Q: What happens to the core of a star after a planetary nebula occur...
A: It becomes a white dwarf. Read More »
Source: wiki.answers.com
Q: What happens to the core of a low-mass star after a planetary neb...
A: It becomes a white dwarf. Read More »
Source: answers.yahoo.com