How do they know they got all the sizes right?

I feel impotent.

It's science. They don't know, they're just going of their best evidence to date.

That being said, they do have some pretty nifty calculations they can make:

From "Man of the year" to "Impotent" with the removal of just one letter.


A good bash on Celestica usually leaves me feeling the same way as that video. It's a nice exercise in humility.

This is BS. Well, partly. The last star is said to be 3 trillion km across, or almost one-third of a light-year. That is not possible for a number of reasons. Antares is the largest star whose diameter is accurately portrayed.

My Cephei (alt. Mu Cephi, other sp. poss.) has a diameter 2,500 times that of our sun.

Kyrcant... if your last statement was supposed to be a correction on the diameter - I thought I would just point out that 2,500km x 1,392,500km (the suns diameter) is exactly what they listed in the video, 3,481,250,000km.

Also for the record the value for My Cephei is roughly 3.5 billion km NOT trillion.

Very cool, very interesting.

those stars can only wish they were as humble as us