When will I get my certificate for this course?
You should be a member of the community to be able to interact
good
Nice cours
good
good
Very goid introduction
Good
Good
This is pretty good. I Like astronomy but still I'm curious on how exactly time dilation happens, why should time slow down than time at another location when in different speed, like how. what's science behind it?
Nice But you should improve the quality of teaching more.
Excellent lecturer
