THE UNIVERSE AND OUR PLANET

good morning, welcome to my blog.

Today I will talk about a work entitled Natural sciences
THE UNIVERSE AND OUR PLANET
THE UNIVERSE:
What way?

The universe is formed by spaced apart by great distances galaxies.
the galaxy can be grouped to form clusters of galaxies and star clusters they are also.
the stars are formed primarily and hydrogen and helium.
within galaxies or in the periphery can be found groupings of stars called star clusters.
Also in the stars of galaxies there are clouds of gas and dust called nebulae.
Our galaxy is called the Milky Way.
One of the more accepted theories he origin of the universe is the Big Bang theory.
That has some measures and distances in astronomy and units, of which defines it
Astronomical Unit (AU) is the average distance from the earth to the sun 150 million km.
Light year is the distanc
e light travels in a year, which is 9.5  km.