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Transcript
Black Hole - a theoretical massive object,
formed at the beginning of the universe or by the
gravitational collapse of a star exploding as a
supernova, whose gravitational field is so
intense that no electromagnetic radiation can
escape.
Galaxies - a large system of stars held together
by mutual gravitation and isolated from similar
systems by vast regions of space.
Dark Matter - matter known to make up
perhaps 90% of the mass of the universe, but not
detectable by its absorption or emission of
electromagnetic radiation
•There are many galaxies
in the universe, and our Another galaxy , The
galaxy, the Milky Way Canis Major Dwarf, was
found by German
galaxy, has many solar Astronomers on November
systems and planets in it. 10, 2010. This is currently
the closest galaxy to our
own.
•The nearest spiral
galaxy, the
Andromeda galaxy,
is many of the
thousands in our
universe; they all
expand to the outer
reaches of space.
•Spiral Galaxy- A
spiral galaxy has a
revolution every 250
million years. Our own
galaxy is 175 million
more years to have
another revolution.
•Elliptical Galaxy- In
an Elliptical Galaxy,
the stars have no
current rotation, so it
cannot have a
revolution.
•Irregular Galaxy- This Galaxy
take just as long as a spiral galaxy
to have a revolution due to it
being a type of spiral galaxy.
• Black holes are formed
when a supergiant star’s
life ends.
Black holes were fist found in the
late 1790s by two astronomers
from Germany and France.
•These pull everything
into it with its enormous
amount of gravitational
pull.
http://science.discovery.com/videos/super
massive-black-holes-the-black-hole.html
•If you look at a picture
of our universe, you will
see a big bright circle. That
is called a super massive
black hole
• A black hole will use its
gravity to pull and shrink
any mass towards itself
down to a marble
Dark matter was found on
January of 1937.
•Dark Matter is
impossible to see with the
naked eye and even a
telescope, but it is there.
This is what dark matter
would look like if it was
blue.
It is theoretical that
dark matter is just in
space, but they are
debating whether it is
on earth and other
planets too.
http://www.pbs.org/wgbh/nova/physics/dark-matter.html