Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: Astronomy I
Description: These notes cover everything from metric units, revolution, stars, the planets and many other interesting things about astronomy.
Description: These notes cover everything from metric units, revolution, stars, the planets and many other interesting things about astronomy.
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
UNIT ONE IN-CLASS NOTES
8/21
•
•
objects in space
movement of objects in space
Astronomy is the scientific study of the universe and everything inside of it & what is contains
...
Science is a progress report & is constantly changing and science is an ongoing process
...
What we know and how we learn it
...
A mnemonic to remember the steps in a simplified version of the scientific method is :
People : problem
On : observations
Hairy : hypothesis
educated possible solution; educated because of the observations
Elephants : experiments
Always : analysis
Cry : conclusions
In 2006, Pluto got demoted and is not a planet anymore
...
8/23
•
•
•
•
•
•
•
What is a unit?
o The standard sizes we are comparing too that everybody agrees on
Units of length
o 1 meter=5280 feet
o 1 foot=12 inches
Metric units
smallest to largest
o Nanometer
10^-9
o Micrometer
10^6
o Millimeter
10^-3
o Centimeter
10^-1
o 1 meter
m
o 1 kilometer
km
o Megameter
= 1 million km
o Gigameter
=10^9
o Terameter
=10^12
trillions
Solar system = everything that belongs to sol, the sun
...
Like the eight planets and 5 dwarfs
...
184 moons
...
4
...
galaxy= stars bound together by gravity orbiting a common center of gas
...
We get around 250 billion stars
...
called island universes
...
There is only one that we know of
...
Our universe is
13
...
The big bang is the start of the universe
...
Create clusters called filaments and walls around voids
...
49 x 10^8 km
o Used to measure things in the solar system
...
Scale 10 cm= 1 AU
The speed of light is constant
Distance = speed X time
Units must cancel to do multiplication, so you have to convert
...
5 times in a second
...
5
Other sciences, you can see it in real time and you can touch the other sciences but in space, we
can’t see the sky as it is today
...
8/28
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
If a hypothesis always worked multiply times, it becomes a theory
A theory has been tested and it works
model: a description of nature
...
9999% empty
Everything is made of atoms & atoms can be taken apart
Atoms
o Protons
o Neutrons
o Electrons
Plasma is an ionized gas
the atoms are charged
The universe started with the Big Bang
The Big Bang happened January 1st
The ancient Greeks and romans thought the earth was the center of the universe
o They thought the sky was a ball and turned around the earth once a day
...
It’s the earth that’s spinning
The earth orbits the s
Title: Astronomy I
Description: These notes cover everything from metric units, revolution, stars, the planets and many other interesting things about astronomy.
Description: These notes cover everything from metric units, revolution, stars, the planets and many other interesting things about astronomy.