Download Stars

Stars and Galaxies
By Jake Koch-Gallup, Matthew Yorro, Aidan McCaul,
Brigitte Bazie, and Laura Lill
Galaxies and stars
A galaxy is massive gravitationally bound system that
consists of stars. It also has stellar remnants in it. A star
is a hot, fiery globe shaped mass of gas. It produces its
own light. The closest star to earth is the Sun. Out of all
the stars in the universe the sun is the most important to
us!
Jake Koch-Gallup
Sizes of galaxies
The smallest galaxy is Wilman 1 which is 120,000
light years away from the Milky way. The biggest
galaxy was the IC 1101. It is 1 billion light years
away. IC 1101 is six million light years in size.
The galaxy sixty times larger then the milky way.
When you look up at night do you wonder how
many stars there are? Well there are about
2,000 stars!
Jake Koch-Gallup
Stars And What They Are
• Stars can grow and shrink, these are called
variable stars
•Temperature changes the color of stars
•A young star would be 10- 200 million years
old and are very hot with a blue color
•To reach the nearest star it would take Alpha
Centauri ( about 25 million trillion miles)
•Stars can be different colors like blue, red,
yellow, and orange
Matthew Yorro
How Many Stars Are There In
Our Galaxy?
•There are about A million stars in our
galaxy
•Stars Are Born In Nebulas ( Gas And Dust)
•A Star Is A Ball Of Hot Glowing Gases
•The Brightest Star Is Called Sirus
•Nobody knows how big our galaxy is, but they say its
infinite!
Matthew Yorro
Shooting Stars
•A shooting star isn’t a star at all its really a star its bits
and pieces of a meteoroid.
•They break off of meteoroids and increase in speed to
cause fire on the piece.
•There falling into earths atmosphere so they catch on
fire and take on the look a a star.
•They usually end up crashing into earths atmosphere
and making a big crater.
•The craters are mostly caused because of the
meteoroids speed.
Aidan McCaul
Star Sizes
•
•
•
•
Well, the biggest star known is the VY Canis Majoris.
It is about 2,100 times larger than the sun.
It would fit about 9,261,000,000 suns in it.
The smallest star known is the OGLE-TR-122B it is 12
solar radii.
• That is about 167,ooo km (kilometers).
Aidan McCaul
Constellations
Constellations are formations (or pictures) made by stars.
Greek and Middle Eastern astronomers named the constellations after
characters from mythology.
The formations appear at different times of the year. Each
season earth can view a different sets of constellations. Also the earth
views a different set of constellations on the northern and southern
hemispheres. Like in August they have different sets of constellations
then in April.
One of the most famous myths is called The Clash Of The
Titans. Here are some of the famous constellations from this story.
Pegasus (winged horse), Hydra (Water Snake), Hydrus, Hercules, and
Scorpios (scorpion).
Aidan McCaul
Galaxy Names
Galaxies are listed in catalogs. The most in
common catalog is New General Catalog, or,
NGC. Galaxy names are identified by letters and
numbers. For example, galaxy cluster, JKCS041,
a letter and number name, is the farthest galaxy
cluster away from Earth. Actually, 10.2 light years
away. Some galaxies names are the Enhanced
Andromeda, Andromeda Widefield, Whirlpool
galaxy, Andromeda Core, Pinwheel galaxy, Leo
Pair, NGC, Galaxy NGC, and of course, the Milky
Way!
Brigitte Bazie
What is the most common type of star?
The most common type of star is the red dwarf star. One
example of a red dwarf, Proxima Centauri. Proxima
Centauri is the closest star to the sun. It is 4.2 light
years from the sun. Proxima Centauri is about fainter
20,000 times than the sun. The lifetime of Proxima
Centauri is about 1,900 years!
Brigitte Bazie
Our Milky Way
The Milky Way is our galaxy NOT a
candy bar! There are tons of stars in our
Milky Way but no one knows the exact
answer. Scientists predict that there are
between 200 and 400 billion stars in our
Milky Way. That’s a lot of stars!
Laura Lill
Star Death
Did you know that stars die and can turn into
different things after they're dead? Well all of
that is true! A star starts to die when their core
runs out of hydrogen and then helium. The dead
star could become a black hole, a neutron star
or a black dwarf depending on how big or small
it is. Bigger stars usually have shorter lives and
stars that live near the sun have shorter lives to
because they burn lots of nuclear fuel.
Laura Lill
Sources
Brigitte Bazie
•
Hubblesite.org
•
Encyclopedia.com
•
usra.edu
•
Galaxyphoto.com
•
Wired.com
•
Iau.org
Aidan McCaul
•
Astronamy.com
•
The Night Sky (Chapter 1) By Robin Kerrod Marshall Cavendish Co. Tarry town, New York 1996
Laura Lill
•
Answers.com
Jake Koch-Gallup
•
Answers.com
•
Stars Chapter: The Stars page 5 The Rourke corporation By: Seymours Simon
Matthew Yorro
•
Answers.com
•
Stars (Pg. 1-17) The Rourke corporation By: Seymours Simon