The Universe

The Big Bang Theory  Georges Lemaître was the scientist who proposed this theory  He proposed that the universe started as a singularity, then it rapidly expanded, This created the starting fundamental particles  Those particles then made stars, planets, and galaxies

The Big Bang Theory  Scientists believe that the big bang left over CBR, or cosmic background radiation  they mapped it once with a probe named COBE (Cosmic background explorer), and again with WMAP, a more advanced probe, getting a better picture  Arno Penzias and Robert Wilson found this radiation when monitoring microwave radiation in space, and CRB was signal interference they were receiving

The Expanding Universe  The universe is steadily expanding, pulling galaxies along with it  Edwin Hubble found galaxies outside of ours that are moving further away from ours, each at a different speed  Hubble proposed that the universe is expanding, explaining why the galaxies were moving  It appeared that all of said galaxies started moving from the same place

Space Technology  Scientists used many different technologies to advance their understanding of the universe, such as the Hubble telescope and satellites  Scientists can see how the galaxies are moving by using a spectroscope and measuring the wavelength of visible light. A galaxy in movement away from us is known to be ‘red shifting”  Scientists also use hadron colliders to try to simulate what could have happened at the beginning of the universe by smashing atoms apart

Galaxies  After the big bang, the universe was only subatomic particles and radiation  but after long periods of time, stars and planets started to form together to make galaxies, and are held there by gravity  Galaxies come in many different sizes and shapes. Our milky way is a spiral galaxy, a relatively normal shape  Scientists believe that a lot of galaxies, including our own have a supermassive black hole at the center of our galaxy

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