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Standing Up in the Milky Way - Season 1 Episode 1 - 0:00 – 26:30 The Cosmos
Standing Up in the Milky Way - Season 1 Episode 1 - 0:00 – 26:30
The Cosmos
WHAT IS AN ATOM?
Proton
NucleusIsotopes
Ions are atoms of an element that contain different numbers of electrons than protons.
GalaxiesSolar SystemPlanetsUniverse
Place these in OrderSMALLEST TO LARGEST
SMALLEST TO LARGEST
Planets Solar System GalaxiesUniverse
Place these in Order
The Scale of the Universe
We are a very small part of the big picture!
There are over 40 billion galaxies in the universe!
The Big Picture
Our Solar System is apart of the Milky Way Galaxy, which is part of Billions of Galaxies that make up our Universe.
Light Year and Distance
Light Year (ly): distance light travels in one year.
A light year is not a measure of time. Light travels 9.5 trillion kilometers in one year. That’s a lot!
Star: 4.3 ly away It will take light _______________ years to reach our eyes. (Proxima Centauri)
The Big Bang Theory:
States that a long time ago there was, for some reason, an expansion of space from a single point.
~ 14 billion years ago:
The Big Bang Theory: :
• The universe was a tiny speck. All the material that makes our universe was about the size of a grain of sand.
• Something caused space to start expanding from this single point.
• Over time the universe has cooled, but is still expanding today.
(What proof do we have? Stay Tuned!)
• After about 1 billion years, the first stars and galaxies started to form….
14 billion years ago
The Big Bang Theory: :
All Galaxies are not moving through space, they are moving as the space expands.The are in fixed positions.No matter where you are, you see all space getting farther apart
from one another.There is no geometric center or edges to the universe.Think of raisin bread…..
10 billion to 20 billion years ago
The Big Bang Theory:
The “raisin bread” analogy
raisins galaxies, dough space
10 billion to 20 billion years ago:
The Big Bang Theory: 10 billion to 20 billion years ago:
The “raisin bread” analogyraisins galaxies, dough space
The Big Bang Theory: 10 billion to 20 billion years ago:
The “raisin bread” analogyraisins galaxies, dough space
Note: raisins are not moving through dough.
Rather, blobs of dough are expanding, and
pushing the raisins farther apart.
The Big Bang Theory: 10 billion to 20 billion years ago:
The “raisin bread” analogyraisins galaxies, dough space
Note: galaxies are not moving through space.
Rather, blobs of space are expanding, and
pushing the galaxies farther apart.
