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...
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?
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
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 ...
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
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.
... 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
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 ...
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.
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?