Known Universe - 2009 Most Powerful Stars 3-3 was released on:
USA: 19 May 2011
Yes, blue stars are considered to be the hottest stars in the present classification of stars in the known universe.
approximately 200 billion trillion stars in the universe.
How the Universe Works - 2010 Stars 1-4 was released on: USA: 10 May 2010
The Universe - 2007 Death Stars 4-1 was released on: USA: 18 August 2009
fusion reactions in stars
fusion reactions in stars
It is impossible to list them all. There are 100 billion galaxies in the known universe, each containing millions to trillions of stars.
Stars are scattered all across our universe but guess what? there are no stars in our solar system besides the sun!
The Universe.
It is not currently known. It seems very likely, given the huge amount of stars/planets in the Universe. (There are roughly 1011 galaxies in the observable Universe, with an average of 1011 stars per galaxy; it is now believed that most stars have planets.)
The collection of all visible or detectable galaxies is known as the universe. Each galaxy is a vast collection of stars--billions of them. Some galaxies have trillions of stars.
A galaxy contains billions of stars. A universe contains billions of galaxies.