our universe
DESCRIPTION
Our Universe. Our galaxy is known as the Milky Way. There are thousands of other galaxies in our universe. Other galaxies in our universe have many similarities to our Milky Way. - PowerPoint PPT PresentationTRANSCRIPT
Our Our UniverseUniverse
Our galaxy is known as Our galaxy is known as the Milky Way.the Milky Way.
There are thousands of There are thousands of other galaxies in our other galaxies in our
universe.universe.
Other galaxies in Other galaxies in our universe have our universe have many similarities many similarities
to our to our Milky Way.Milky Way.
Other Other galaxies of galaxies of our universe our universe appear to appear to have the have the same same elements elements (like those (like those found on our found on our Periodic Periodic Table of the Table of the elements).elements).
They also appear to They also appear to have the same kinds have the same kinds
of forces, such as of forces, such as gravity.gravity.
And they appear to And they appear to have similar energy have similar energy
sources – such as sources – such as energy from stars energy from stars (like our sun), and (like our sun), and
internal heat energy internal heat energy within large bodies within large bodies (like our planets).(like our planets).
Most of what we know Most of what we know about our vast universe about our vast universe
so far has been so far has been discovered using tools discovered using tools and technology such as and technology such as
the Hubble Space the Hubble Space Telescope.Telescope.
How vast is vast?How vast is vast?The farthest thing The farthest thing ever observed by ever observed by
humans is a quasar humans is a quasar 12 billion light years 12 billion light years
away. away.
Since a light year is Since a light year is the distance light the distance light travels in a given travels in a given
year, 12 billion light year, 12 billion light years is how far years is how far
light would travel in light would travel in 12 billion years.12 billion years.
How big is a billion?How big is a billion?
It would take about It would take about 32 years to count to 32 years to count to
one billion if you one billion if you count one number count one number
per second and per second and NEVER stop or NEVER stop or pause at all!pause at all!
Light travels Light travels 300,000 300,000
kilometers kilometers per second!per second!
So 12 billion So 12 billion light years is a light years is a very long way!very long way!
Scientists estimate that Scientists estimate that the universe is the universe is
approximately 15 billion approximately 15 billion light years across. That light years across. That means it would take 15 means it would take 15 billion years traveling at billion years traveling at
the speed of light the speed of light (something we can’t do (something we can’t do yet) to reach the edges yet) to reach the edges
of the universe!of the universe!
There are many more There are many more things to discover about things to discover about
our universe, but because our universe, but because it is so vast, it will take a it is so vast, it will take a long time for scientists to long time for scientists to
develop more ways to develop more ways to explore it.explore it.
The name of the galaxy in which you find our solar
system is the
A: Black HoleB: Double SpiralC: AndromedaD: Milky Way
How many galaxies are in our universe?
A: thousandsB: hundreds
C: tenD: just ours
The same elements found in our Periodic Table of the elements can be found in stars and celestial bodies throughout the universe.
A: TrueB: False
The force of gravity is only found within our solar
system.
A: TrueB: False
Celestial bodies throughout the universe get their energy from our sun.
A: TrueB: False
Most of the information we have discovered about the distant universe has come
from
A: the Hubble Telescope.B: the Apollo program.
C: space travel.D: the International Space
Station (ISS).
The farthest object ever observed by humans is a
quasar that is
A: 12 billion miles away.B: 4 billion kilometers
away.C: 12 billion light years
away.D: 10 million kilometers
away.
A light year is
A: the distance between the Earth and the sun.B: the time it takes to
travel to the moon.C: the distance light
travels in one Earth year.D: 365 days.
It would take 32 years to travel to the end of the
universe in a space ship.
A: TrueB: False
You are looking into the night sky and notice a particular star. You
research the star and find out it is 5,000 light years away. Which of
the following is true?
A: the star is 5,000 years oldB: the light you see from that
star today began its travel 5,000 years ago
C: the star will explode and die within 10 years from now
D: none of the above