The core will have become so dense and so jam-packed that it's even more dense than a neutron star. The resulting object has a gravitational pull so strong that not even light can escape its grasp. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile.
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Measure content performance. Develop and improve products. List of Partners vendors. Share Flipboard Email. John P. Millis, Ph. Professor of Physics and Astronomy. Updated January 10, Featured Video. Cite this Article Format. Millis, John P. How Long Do Stars Live? An expression for the main sequence lifetime can be obtained as a function of stellar mass and is usually written in relation to solar units for a derivation of this expression, see below :.
The lifetimes of main sequence stars therefore range from a million years for a 40 solar mass O-type star, to billion years for a 0. Given that the Universe is only The luminosity of the star is the energy released per unit time. Eta Carinae was probably formed less than 3 million years ago. It consumes fuel so fast in its core that it gives off 4 million times the energy of the Sun. Astronomers think that Eta Carinae has less than , years to live.
In fact, it could detonate as a supernova any day now…. As stars get smaller, they live longer. Our own Sun has been around for 4. The Sun will run out of this hydrogen fuel in another 5 billion year or so, and it will turn into a red giant. It will expand to many times its original size and then eject its outer layers and shrink down to a tiny white dwarf star, a dense object the size of the Earth. So the total lifespan of a star with the mass of the Sun is about 10 billion years.
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