Final answer:
A starburst galaxy is a galaxy that experiences a burst of intense star formation, resulting in clumpy shapes and higher rates of star formation. In the future, galaxies will eventually run out of stars and become dark and lifeless.
Step-by-step explanation:
A starburst galaxy is a galaxy that experiences a burst of intense star formation. These galaxies often resemble nearby merging galaxies, with multiple nuclei and peculiar shapes. They are clumpier than normal galaxies and have higher rates of star formation. Starburst galaxies also contain lots of young, blue stars.
When galaxies collide, the collision can trigger an increase in the rate of star formation, resulting in a starburst. In some interacting galaxies, the burst of star formation is temporary and exhausts all available gas in a few million years. However, while the starburst is happening, the galaxy becomes much brighter and easier to detect.
In the future, the light that reveals galaxies to us will eventually go out, leaving galaxies dark and lifeless. There will come a time when all the stars are gone, and no source of heat remains to help living things survive. At that point, the lifeless galaxies will continue to move apart in their lightless realm.