Lesson 6 of 15 • 0 upvotes • 9:00mins
A hypothetical and unknown matter which is making up a huge part of mass-energy in our observable universe. It is not detectable because of it's non-interactive property with any electromagnetic radiation but its existence is evident from its gravitational effect on visible matter and gravitational lensing.
15 lessons • 3h 8m
Different Motions of Earth
9:56mins
Seasons
13:46mins
Astronomical Scales
14:46mins
Milky Way Galaxy
13:00mins
Dark Energy
10:06mins
Dark Matter
9:00mins
Comets
14:28mins
Asteroids
14:52mins
Meteoroids
12:18mins
Galaxies
13:53mins
Stellar Evolution- I
13:41mins
Stellar evolution-II
11:18mins
Binary Stars
10:16mins
The Star Sun
14:03mins
Solar System
13:27mins