So you know what a star is, right? Well, if you don't, you should. We've talked about that big one in the sky a few times: The Sun! But there are a lot of bright dots in the night sky and not all of them are stars. Today, let's play a...

Why are stars different brightness, colours and sizes? A look at the main sequence of stars, and what makes stars different from each other.

This video covers:

- How stars form, live an
d die
- How they transition between a nebula, protostar, main seq
uence star
- And then either red giant, white dwarf
and black dwarf
- Or red super giant, supernova,...

So we have made it through the dark ages, and are now a few hundred million years into the lifetime of the universe. There are plenty of stars all over the place, but are they all the same? How can we classify stars? Let's go through the...