1. VY Canis Majoris
2. Betelgeuse (which is scheduled to supernova sometime between 2012 and a million years from now)
In terms of volume and most massive:Volume: VY Canis Majoris.Massive: R136a1
trillions If our galaxy with 2*1011 (two hundred billion) stars is an average size galaxy. and there are as many galaxies in the Universe as there are stars in our galaxy, then there are possibly 4*1022 stars in the Universe. But that is just a guess. There are most certainly more than 1018 stars.
The two most common elements in the Universe, and in most stars are - in that order - hydrogen and helium (elements #1 and #2).
No. Two colliding red dwarfs will merely result in a new star with the combined mass of the two original stars. The merging of two stars would be utterly insignificant on the scale of the whole universe.
There are no known "infinite energies" in our real Universe.
In our known universe, hydrogen then helium. But this may change with further exploration.
Why stars "burn", and the size of the universe.
There are more than twenty-two stars in the constellation Sagittarius. Sagittarius is one of the largest constellations in the sky and contains numerous stars of varying brightness and sizes.
The Big Crunch: Like the opposite of the big bang, the universe collapses and goes into a point of singularity. The Big Chill: The universe will keep on expanding, until there is too few galaxies and stars, which will eventually die out too, so there will be nothing in the universe but a few black holes and decayed stars and galaxies
Most of the universe is made up of hydrogen gas, followed by helium. These two gases are the most abundant elements in the universe and can be found in stars, galaxies, and interstellar space.
The two main elements in stars are Hydrogen and Helium. Stars start out as mostly Hydrogen and produce Helium. There are less amounts of heavier elements like Oxygen, Neon and Iron in stars
Milliard is an archaic name no longer used. It referred to 109 or what we now refer to as a billion. The exact number of stars will probably never be known. There are, perhaps, 200 million or more in our galaxy, our is average. There are many BILLIONS of galaxies. Another number that may never be known.