Solar System Formation - Unatego Formation 20154.pdf · Our Solar System Notes.notebook 3 October...
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Our Solar System Notes.notebook 1 October 14, 2015 Sep 296:24 PM Solar System Formation Sep 296:24 PM Background Information System: Many pieces that make up a ________________ whole Sep 296:24 PM Solar System: Anything that orbits the ________________ Sun Sep 296:24 PM Just like in the formation of of stars….. ___________________ plays a major role. Gravity Sep 296:24 PM _________________________ _______________ is also known as the strength of gravity or the “pull” of gravity. It is dependent upon the ______________ of the two objects and the _________________ between the two objects. Gravitational Force mass distance Gravitational Force = G m1 m2 r 2 (G = Gravitational Constant = 6.67x 10 -11 N m 2 / kg 2 ) . Sep 296:24 PM As ___________ increases; gravitational force (gforce) increases: mass g-force mass
Transcript of Solar System Formation - Unatego Formation 20154.pdf · Our Solar System Notes.notebook 3 October...
Our Solar System Notes.notebook
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October 14, 2015
Sep 296:24 PM
Solar SystemFormation
Sep 296:24 PM
Background Information
System:
Many pieces that make up a ________________whole
Sep 296:24 PM
Solar System:
Anything that orbits the ________________Sun
Sep 296:24 PM
Just like in the formation of of stars…..
___________________ plays a major role.Gravity
Sep 296:24 PM
_________________________ _______________
is also known as the strength of gravity or the“pull” of gravity.
It is dependent upon the ______________ of the
two objects and the _________________ between
the two objects.
Gravitational Force
mass
distance
Gravitational Force = G m1 m2
r2
(G = Gravitational Constant = 6.67x 10 -11 N m 2 / kg 2).
Sep 296:24 PM
As ___________ increases; gravitational force (gforce) increases:
mass
g-fo
rce
mass
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_______________ slope indicates a
_______________ relationship
Positive
direct
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As ___________ increases; (gforce) decreases:distance
g-fo
rce
distance1 2 3 4 5
1
2
3
4
5
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_______________ slope indicates an
_______________ relationship
Negative
inverse
Jul 98:13 AM
Gravitational Force = G m1 m2
r2
Note: Gravitational Force is reduced by the SQUARE of the distance between the two objects....
For example: if the distance between two objects is doubled,the gravitational force is reduced by 4 times
(or) it is 1/4th as strong as it was originally.
g-force x -4 = 1 ∴ g-force = 1 -4
g-force reduced by 4 times
original g-force
Put in your notes...
Sep 297:21 PM
Why doesn't gravity simply pull all of the planets into the Sun?
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Another consideration concerning solar system formation is INERTIA:
The tendency of a body in uniform motion to remain in uniform motion.
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When the force of gravity and inertia are in
_______________________, the object
establishes an ORBIT.
equilibrium
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Objects orbit around the
_____________ _____ ______________
of a system.
center of gravity
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Formation of our Solar System
In addition to the following notes, these captions areimportant too.
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Stage A:
_________________
occurs creating a
cloud of intersteller
_______ and ________
Supernova
gas dust
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Stage B:
Gravity causes the cloud to
___________________.
The bulge eventually contractsenough to form a
____________________ and
then a star (our Sun).
condense
protostar
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Eventually, _______________ and _______________reach an equilibrium and the planets establish orbitsaround the Sun.
Stage C:
gravity inertia
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Geocentric versus Heliocentric Systems
Geocentric:
Belief that everything revolved around a stationary Earth.
Earth - Centered
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Geocentric versus Heliocentric Systems
Geocentric:
Belief that everything revolved around a stationary Earth.
Established by ancient Greeks as far back as Aristotle’s time (350 BC).
Ptolemy (TAHLuhmee) (~140 AD) added that each planet had “miniorbits” of their own as they orbited the Earth.
called "epicycles"
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Geocentric versus Heliocentric Systems
Geocentric:Epicycles helped to explain "retrograde" motion of the planets.
To reverse direction against background stars
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Geocentric versus Heliocentric Systems
Geocentric:
The epicycle of Venus was placed in line with the Sun to explain the reason that Venus is only visible in the east just before sunrise and in the west just before sunset....never high in the nighttime sky.
(other adjustments continued to be made)
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Geocentric versus Heliocentric Systems
Heliocentric:
Understanding that everything revolved around the Sun.
First hypothesized by Copernicus (~1500)
Confirmed by Galileo with the use of his telescope (~1600)
Sun-centered
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Geocentric versus Heliocentric SystemsHeliocentric:
Galileo’s evidence:
1. Observed 4 moons orbiting the planet
________________ and not Earth.
2. Observed that the planet _______________ had phases that only an orbit around the Sun could produce.
Jupiter
Venus
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Venus's motion according to Ptolemy(epicycle)
Sep 111:18 AM
Phases of Venus as observed by Galileo
Sep 111:21 AM
Galileo's observations best explained by the heliocentric model
Supports the reason we can see a "full" phase of Venus.
http://www.teachersdomain.org/asset/ess05_vid_galileosys/
