Expanding Universe and Dark Energy
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Last updated over 3 years ago
30 Nsɛmmisa
Did you know we are part of a spiral galaxy called the Milky Way? Earth is located in an arm of the spiral.
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Did you know we are part of a spiral galaxy called the Milky Way? Earth is located in an arm of the spiral.
When we talk about the universe we mean everything that exists. Galaxies, planets and everything in between. Scientists think the edge of the universe is expanding faster than the speed of light!
What constitutes the universe?
It’s hard to imagine just how big the universe is. Scientists estimate that there are around 100 billion galaxies!! If you think the Milky Way ( our galaxy ) is thought to have between 200 and 300 billion stars like our sun, it’s pretty impossible to comprehend.
Much of the universe is actually empty space (dark matter and dark energy ) and the things we can see ( ordinary matter ) make up only 4-5% of the universe.
Much of the universe is...
Scientists think stars and planets would not move as they do in empty space, but so far we don’t have the ability to see or measure dark matter. Dark matter is thought to make up between 25-28% of the universe.
Dark energy is how scientists refer to the force that is thought to be behind the expansion of the universe. Dark energy is thought to make up between 67-70% of the universe.
How is the universe expanding like a blueberry muffin?
* Be very detailed in your answer.
When astronomer's do not know anything, what do they tend to say is the cause?
If the expansion gets strong enough what will happen?
What do the tennis balls represent?
What does the elastic represent?
As the elastic expands, what happens to the galaxies?
The rate of expansion is __________ over time.
To show this model properly what would we have to do and what would the elastic have to do?
The gravity of normal matter....
What are the three things that we know about Dark Matter?
What can we not do with dark energy?
Why does the red shift occur?
Empty space has...
What are the theories of what dark energy is?