What is the universe-Page 2

What is the big bang theory?-Page 4

What is in the universe?-Page 6

What is a galaxy?-Page 7

The Milky Way-Page 8

Stellar elovution-Page 10

Preview audio:

storyj.mp/ab5t2264ssv8

What is the universe?
The universe is everything. It includes all of space, and all the matter and energy that space contains. It even includes time itself and, of course, it includes you.

Earth and the Moon are part of the universe, as are the other planets and their many dozens of moons. Along with asteroids and comets, the planets orbit the Sun. The Sun is one among hundreds of billions of stars in the Milky Way galaxy, and most of those stars have their own planets, known as exoplanets.

The Milky Way is but one of billions of galaxies in the observable universe — all of them, including our own, are thought to have supermassive black holes at their centers. All the stars in all the galaxies and all the other stuff that astronomers can’t even observe are all part of the universe. It is, simply, everything.

What is the big bang theory?

The big bang theory is that describes how the from an initial state of high and .physicist Alexander Friedmann equations The earliest empirical observation of the notion of an expanding universe is known as , published in work by physicist in 1929, which discerned that galaxies are moving away from Earth at a rate that accelerates proportionally with distance. of Friedmann's work, and independent of Hubble's observations, physicist proposed that the universe emerged from a "primeval " in 1931, introducing the modern notion of the Big Bang.

What is in the universe?

The universe is everything. It includes asteriods, stars, planets, natural satelites, galaxies, solar systems, black holes, quasars, meteores, shooting stars and comets.

What is a galaxies?

A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. We live on a planet called Earth that is part of our solar system.