A planetary nebula, often abbreviated as PN or plural PNe, is a kind of emission
nebula ... After most of the red giant's atmosphere is dissipated, the ultraviolet
radiation of .... This led to ...
Explain why degeneracy pressure can support a stellar core against gravity even
when the ... What happens to the core of a star after a planetary nebula occurs?
May 7, 2015 ... As the main sequence star glows, hydrogen in its core is converted into helium by
nuclear fusion. ... A planetary nebula is formed by the outer layers. ... However,
their life cycles start to differ after the red giant phase. ... What happens between
the red giant phase and the supernova explosion is described ...
It gets to the point where the star loses gravitational hold on its outer layers and
they get pushed away the pressure exerted by the stellar wind and by the
photons leaving the core. ... These shed outer layers are called a planetary
nebula. ... or if the companion is too small or too far away, no accretion will occur,
and it will be ...
Stars are hot bodies of glowing gas that start their life in Nebulae. ... now starts to
contract further and reactions begin to occur in a shell around the core. ... core as
a gaseous shell, this gas that surrounds the core is called a Planetary Nebula.
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
... 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
Mar 26, 1998 ... In addition, astronomers can calculate what would happen to stars .... look disk-
like in a telescope, they are called planetary nebulae. Some giants are massive
enough to start other cycles of nuclear reactions after their helium runs out; ...
When helium begins to fuse in the sun's core, the outer gases of the ...
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.
How does a star's mass affect nuclear fusion? ... a) hydrogen fusion will begin in
a shell around the core. b) helium will begin to fuse ... What is a planetary nebula
? ... What happens in a high-mass star after it stops ... b) A helium flash occurs.