Transcript Galactic Address/Stars/Constellations

Galactic Address, Galaxies,
and Stars
There’s no place like home…
• www.Googlemaps.com
• Powers of Ten video
• https://www.youtube.com/watch?v=FEuEx
1jnt0M
• What is your galactic address?
Galactic Address
• Name
• Room 226
• Cinnaminson Middle
School
• Cinnaminson
• Burlington County
• New Jersey
• United States of
America
• North America
• Northern
Hemisphere
• Earth
• Solar System
• Milky Way Galaxy
• Local Group
• Virgo Supercluster
• Universe
Galaxies
• A large group of stars (million+), gas, and
dust held together by gravity.
4 shapes of galaxies
•
•
•
•
Spiral-normal
Spiral-barred
Elliptical
Irregular
Spiral - Normal
Spiral - Barred
Elliptical
Irregular
The Milky Way
What happens when galaxies collide?
https://www.youtube.com/watch?v=DOLJXNM4C8k&feature=related
Power of Ten – Again!
https://www.youtube.com/watch?v=EMLPJqeW78Q
Stars
What is a star?
What is a star?
• A star is an object in space that produces
its own light and heat through nuclear
reactions.
Size of Stars
• Stars can be as small as Earth or as large
as the orbit of Jupiter.
• https://www.youtube.com/watch?v=HEheh1BH34Q
Surface Features
Surface Features
• Sunspots - cooler, darker areas.
Surface Features
• Flares – erupting columns of gas caused
by sunspots.
Surface Features
• Prominences - arching columns of gas
Prominences
Not the actual location of Earth
Surface Features
• Coronal Mass Ejections (CME’s) –
electrically charged particles sent towards
Earth.
CME’s
• Can disrupt radio, satellite, and phone
use.
• Also causes auroras to occur.
http://spaceweather.com/swpod2011/22sep11/media.mp4
http://www.pbs.org/wgbh/nova/sciencenow/0304/02.html
CME’s
• Earth’s magnetic field helps protect us
from the CME’s.
http://missionscience.na
sa.gov/sun/sunVideo_0
4magnetosphere.html
Constellations
What is this constellation?
Cassiopeia
Constellations
• Constellations are patterns of stars in the
sky.
• Stars are organized into 88 constellations.
Constellations
• Constellations can help identify directions
in the sky and time of year.
Constellations
• Constellations also may tell a story.
Star Classification
Observe a candle flame
• What colors do you
notice?
• Why are there
different colors?
• How does a candle
look up close? Far
away?
Classification
• Stars are organized by temperature and
brightness.
Temperature
• Hot stars are blue-white
• Cool stars are red-yellow
H-R Diagram
• H-R Diagram - a chart used to classify
stars based on temperature and absolute
magnitude (brightness).
brightness
bright
dim
hot
temperature
cool