# Science need help

Astronomers believe that
the biggest stars in the Galaxy may be a hundred times more massive
than the Sun, but are a million times brighter. Would you expect such
stars to have longer, shorter or comparable lifetimes to that of the Sun?

1. 👍 0
2. 👎 0
3. 👁 63
1. Shorter. To be a million times brighter than the sun, they must consume fuel (hydrogen and helium)a million times faster. But they only have 100 times more fuel than the sun; so they only last 10^2/10^6 = 10^-4 as long as the sun before blowing up and burning out

1. 👍 0
2. 👎 0
posted by drwls

## Similar Questions

1. ### physics

A star of mass 2.0 1031 kg that is 4.8 1020 m from the center of a galaxy revolves around that center once every 4.2 108 years. Assuming that this star is essentially at the edge of the galaxy, each of the stars in the galaxy has

asked by Sam on July 16, 2010
2. ### English

Astronomers Ferraro and Newman study the speed of the stars circling the galactic center of the galaxy. Identify the appositive or appositive phrase. galaxy Astronomers the galactic center Ferraro and Newman

asked by Deja on November 18, 2014
3. ### science

which of the statements below is true? a) the stars in a galaxy are held together by gravity b) Stars in a galaxy slowly rotate around a center c) The Milky Way is the only galaxy in the universe d)All of the above just need to

asked by ant on August 16, 2010
4. ### Physics

A star of mass 2.0 1028 kg that is 1.6 1020 m from the center of a galaxy revolves around that center once every 3.4 108 years. Assuming that this star is essentially at the edge of the galaxy, each of the stars in the galaxy has

asked by winterWX on February 16, 2007
5. ### physics

A particular spiral galaxy can be approximated by a thin disk-like volume 35 Thousand Light Years in radius and 8 Hundred Light Years thick. If this Galaxy contains 790 Billion stars, estimate the average distance between the

asked by humbrey on January 28, 2017
6. ### physics

A particular spiral galaxy can be approximated by a thin disk-like volume 35 Thousand Light Years in radius and 8 Hundred Light Years thick. If this Galaxy contains 790 Billion stars, estimate the average distance between the

asked by Space problem, show work on January 28, 2017
7. ### science

The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.Which of these observations of Barnard’s Star is most likely accurate? * Captionless Image A Barnard’s Star is

asked by reb on October 16, 2018
8. ### Science

The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.Which of these observations of Barnard’s Star is most likely accurate? * 1 point Captionless Image A Barnard’s

asked by jessica thompson on October 4, 2018
9. ### Science need help ?????///

An astronomer observes two galaxies, A and B, which have redshifts of: Galaxy A = 0.020 and Galaxy B = 0.010. Which galaxy is closest to us and what is its distance away from us? You may assume that the Hubble constant is H0 = 75

asked by sam on April 14, 2013
10. ### Statistics

Astronomers treat the number of stars in a given volume of space as a Poisson random variable. The density in the Milky Way Galaxy in the vicinity of our solar system is one star per 16 cubic light years. (a) What is the

asked by Ashley on February 20, 2014

More Similar Questions