How Many Atoms Are In The Universe

The universe has how many atoms?

Consider the Milky Way, where it is estimated that hydrogen atoms make up 74% of the galaxy’s mass. There are roughly 1057 hydrogen atoms in the Sun. The estimated number of stars in the universe (1023) multiplied by the average number of atoms per star (1057) results in a total of 1080 atoms in the known universe. Today, hydrogen is thought to make up 90% of all atoms in the universe and is crucial to the existence of the material world.Since it was created in the Big Bang, hydrogen is the most prevalent element in the universe, making up about 75% of its normal matter.Today, hydrogen is thought to make up 90% of all atoms in the universe and is crucial to the existence of the material world. The majority of the atoms in our bodies—nearly two thirds—are hydrogen, so that includes us.

How many photons exist in the entire cosmos?

The measurement has now been made by scientists using an indirect method. The team calculated the number of photons (visible light particles) that stars have released over the course of the observable universe and discovered that it is 4 1084 photons. The number of stars in a typical galaxy (100 billion) can be multiplied by the total number of galaxies in the universe (2 trillion), using the Milky Way as a model. The answer is a truly astounding quantity. The universe contains about 200 trillion trillion stars. Or 200 sextillion, to use another term.According to one of these estimates, the observable universe contains between 100 and 200 billion galaxies. There are 2 trillion galaxies in the universe, according to estimates made by other astronomers who attempted to account for missed galaxies in earlier studies.The Milky Way, our galaxy, is home to 100 to 400 billion stars. We can determine that our galaxy contains approximately (1.