Back

White and Black Dwarfs

By Khan Academy from Khan Academy in ASTRONOMY , PHYSICS

This video belongs to the following courses: Cosmology and Astronomy, Life and Death of Stars

Summary
Teach it
Analytics

White dwarfs are thought to be the final evolutionary state of all stars whose mass is not high enough to become a neutron star—over 97% of the stars in our galaxy. A black dwarf is a hypothetical stellar remnant, created when a white dwarf becomes sufficiently cool to no longer emit significant heat or light. Since the time required for a white dwarf to reach this state is calculated to be longer than the current age of the universe (13.7 billion years), no black dwarfs are expected to exist in the universe yet, and the temperature of the coolest white dwarfs is one observational limit on the age of the universe.

Similar videos

Sign up now or Log in to leave a comment.
 
shaggy
2 years, 1 month ago
shaggy
im an astronomy enthusiast, but never heard of black dwarf's. My whole afternoon is day is shot now.

Looking to use this video in your class?

Share it with your students by using the share button above, or login to your Mobento School Account to create your own course using this video. Creating your own course will give you access to analytics about student progress and retention, control of structure, and even allow you to upload your own videos. Don’t have a School Account? You can find out how to get one by using the button below.