what is a star doing when it reaches the red giant stage?

Question

???

Answer 1

Dying. Once all the hydrogen is fused into helium. The next stage of fusion has intense heat and solar wind results. The outer atmosphere of the star is blown off and expanded like a hot-air balloon. Lighter stars, like our sun, can't create enough pressure in the middle to keep the fusion fire going past the second stage. Once the star becomes a planetary nebula, the star in the middle begins a long process of cooling.

Answer 2

We don't live forever and neither do stars. As the hydrogen in a star decreases and the nuclear reactions inside the star's core begin to slow down, the star will balloon out to create a red giant. A red giant may become more than a hundred times its original diameter. Those that can be seen in intergalactic space are the more massive stars that have become supergiants.

Answer 3

A red giant is a star that has depleted all its fuel and it starts to expand and cool down, it will keep expanding until it can no longer expand and then start the slow process of retracting back into itself, A star like our star the sun will do this in a few billion years and by the time its all done it will become a dwarf and eventually burn out in a few bilions of billions of years,

Answer 4

Dying. Red Giants are stars that depleted their own hydrogen and have started using helium for "fuel" to keep shining. The resulting loss of mass causes the star's properties to inflate....what's left is a much larger, though less massive star that shines the color red, indicating it's cooled off a lot.

Answer 5

This is the next-to-last stage in it's evolution... It's done burning all it's hydrogen to helium, and now it's expelling trillions of tons of material away from it's core.

After the gas has been expelled, all that will be left is a white dwarf that will cool slowly.

Answer 6

A star converts five million tons of its mass into pure energy each and every second, over billions of years the mass of the star can no longer create gravity to equal the outward force of radiation and the star begins to expand. It will expand to millions of times its ordinary diameter and finally cool and begin to collapse inward on itself. Most main sequence stars will contract into white dwarf stars, and over millions of years will eventually cool to be nothing more than a big cinder.

Answer 7

purple giants unfastened count number outwards as they improve and middle mass grow to be much less.ultimately they form white dwarf in ordinary terms.If the mass is greater beneficial than 8solar mass i t will make supernovae and grow to be black hollow or neutron action picture star.

Answer 8

it inflates . then it collapses and compresses , creating a blackhole

Answer 9

dying slowly?
http://en.wikipedia.org/wiki/Red_giant