Birth of Stars.notebook - Unatego of Stars (2015).pdf · The star Algol is estimated to have the...
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Birth of Stars.notebook 1 September 30, 2016 Sep 181:48 PM Stars Sep 181:48 PM Nebula = Birth Place of Stars Sep 181:48 PM Nebula: Cold cloud of _________ and __________ gas dust Sep 181:48 PM The primary gas used in star formation is: ____________________________ (H) Hydrogen Sep 181:48 PM Formation of a Protostar (Early Star) A _________________ of gas and dust separates itself clump Gases tend to clump together in the cold Sep 181:48 PM Formation of a Protostar (Early Star) ______________________ pulls the gas and dust inward toward the center of the mass. GRAVITY
Transcript of Birth of Stars.notebook - Unatego of Stars (2015).pdf · The star Algol is estimated to have the...
Birth of Stars.notebook
1
September 30, 2016
Sep 181:48 PM
Stars
Sep 181:48 PM
Nebula = Birth Place of Stars
Sep 181:48 PM
Nebula:
Cold cloud of _________ and __________gas dust
Sep 181:48 PM
The primary gas used in star formation is:
____________________________ (H)Hydrogen
Sep 181:48 PM
Formation of a Protostar (Early Star)
A _________________ of gas and dust separates itselfclump
Gases tend to clump together in the cold
Sep 181:48 PM
Formation of a Protostar (Early Star)
______________________ pulls the gas and dust
inward toward the center of the mass.
GRAVITY
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September 30, 2016
Sep 181:48 PM
Formation of a Protostar (Early Star)
____________________________ begins to rise as
rate of gas atom collisions increase
Temperature
Sep 181:48 PM
Formation of a Protostar (Early Star)
As gas pressure increases, ______________________ increasesdensity
Gravity pulling stuff closer and closer together
gas pressure
Sep 181:48 PM
Formation of a Protostar (Early Star)Equilibrium:
When outward acting ___________ pressure equals
the inward force of ________________________
gas
gravity
Sep 181:48 PM
Formation of a Protostar (Early Star)
Nuclear Fusion begins……. at this point the protostar becomes a
STAR
Sep 181:48 PM
Nuclear Fusion
Two atomic nuclei join together (fuse together) to form a heavier element.
Emits a lot of ENERGY!
http://dsc.discovery.com/videos/stephenhawkingsuniversehomegrownstar.html
Sep 181:48 PM
Nuclear Fusion
Hydrogen + Hydrogen Helium + ENERGY
Energy in the form of ______________ ____________
and other _____________________________ radiation.
visible light
electromagnetic
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September 30, 2016
Sep 181:48 PM
Star Facts:
“Colder” gas clouds produce lower mass stars
“Warmer” gas clouds produce higher mass stars
Sep 181:48 PM
Star Facts:
Larger mass stars = _________________ life spans
Smaller mass stars = ________________ life spans
shorter
longer
millions of years
billions of years
Sep 181:48 PM
Hertzsprung – Russell Diagram (H‐R Diagram)
ESRTpg 15
Sep 181:48 PM
Hertzsprung – Russell Diagram (H‐R Diagram)
The H‐R Diagram is NOT a star map
for example......
Sep 207:32 PM
AlthoughAlpha Centauriis close in proximity to our Sun, Proxima Centauri is closer.
However, Proxima Centauri is NOT similar to our Sun.
Sep 181:48 PM
Hertzsprung – Russell Diagram (H‐R Diagram)
The H‐R Diagram is NOT a star map
It is a scatter graph astronomers use to show the classification of stars based on:
_______________________________________
_______________________________________
_______________________________________
Birth of Stars.notebook
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September 30, 2016
Sep 181:48 PM
Hertzsprung – Russell Diagram (H‐R Diagram)
Sep 181:48 PM
Hertzsprung – Russell Diagram (H‐R Diagram)
The H‐R Diagram is NOT a star map
It is a scatter graph astronomers use to show the classification of stars based on:
_______________________________________
_______________________________________
_______________________________________
Temperature (K) {color}
Luminosity
Mass
Sep 181:48 PM
Hertzsprung – Russell Diagram (H‐R Diagram)
Four Classifications Represented:
_______________________________________
_______________________________________
_______________________________________
_______________________________________
Sep 207:39 PM
Sep 181:48 PM
Hertzsprung – Russell Diagram (H‐R Diagram)
Four Classifications Represented:
_______________________________________
_______________________________________
_______________________________________
_______________________________________
Main Sequence
Giant
Supergiant
White Dwarf
Sep 181:48 PM
Hertzsprung – Russell Diagram (H‐R Diagram)
All stages of a star’s life are represented:
_______________________________________
_______________________________________
_______________________________________
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September 30, 2016
Sep 207:39 PM Sep 181:48 PM
Hertzsprung – Russell Diagram (H‐R Diagram)
All stages of a star’s life are represented:
_______________________________________
_______________________________________
_______________________________________
Early
Intermediate
Late
Sep 181:48 PM
Hertzsprung – Russell Diagram (H‐R Diagram)
Once a protostar becomes a star, its _______________
determines where it “sets‐up” on the ______________
________________________
mass
Main
Sequence
Sep 181:48 PM
Main Sequence:
______ percent of all stars.
Most of a star’s lifetime spent here.
90
Sep 181:48 PM
Which is "colder" Red or Blue?
Sep 181:48 PM
Temperature (in Kelvin)
Color
*Red = _______________ wavelengths
*Blue = _______________ wavelengths
Surface Temp.
ESRT Pg. 14
longer
shorter
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September 30, 2016
Sep 181:48 PM
Luminosity:
Amount of _________________ coming from a star.
This ______________ can be seen in the form of _______________
energy
energy light
Sep 181:48 PM
Luminosity:Involves Temperature and Surface Area (mass)
L = (4∏R2)(σT4)
As mass increases, luminosity _________________
Therefore, luminosity has a ___________________relationship with mass
Sep 181:48 PM Sep 181:48 PM
Luminosity:Involves Temperature and Surface Area (mass)
L = (4∏R2)(σT4)
As mass increases, luminosity _________________
Therefore, luminosity has a ___________________relationship with mass
increasesdirect
Sep 181:48 PM
Luminosity:As temperature increases, luminosity _________________
Therefore, luminosity has a ______________________relationship with temperature
Sep 181:48 PM
Birth of Stars.notebook
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September 30, 2016
Sep 181:48 PM
Luminosity:As temperature increases, luminosity _________________
Therefore, luminosity has a ______________________relationship with temperature
increases
direct
Sep 181:48 PM
Find the Luminosity of our Sun
Sep 181:48 PM
Luminosity:
Sun is used as the baseline for luminosity.
About how many more times luminous is Polaris than our Sun?
Sep 208:52 PM
Sep 181:48 PM
Luminosity:
Sun is used as the baseline for luminosity.
About how many more times luminous is Polaris than our Sun?
~ 5,000 x's
Sep 181:48 PM
Luminosity:
Sun is used as the baseline for luminosity.
What is the luminosity of 40 Eridani B?
Birth of Stars.notebook
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September 30, 2016
Sep 208:52 PM Sep 181:48 PM
Luminosity:
Sun is used as the baseline for luminosity.
What is the luminosity of 40 Eridani B?
~ 1 of our Sun 100
Sep 181:48 PM
Practice:
What color is the star Bellatrix which has a surface temperature of 21,000 K?
Sep 208:52 PM
Sep 181:48 PM
Practice:
The star Algol is estimated to have the same luminosity as the star Aldebaran and about the same temperature as the star Rigel. What type of star would Algol be classified as?
Sep 208:52 PM
Birth of Stars.notebook
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September 30, 2016
Sep 208:52 PM Sep 181:48 PM
Practice:
The star Algol is estimated to have the same luminosity as the star Aldebaran and about the same temperature as the star Rigel. What type of star would Algol be classified as?
Main Sequence
