telescopes
Download
Skip this Video
Download Presentation
Telescopes

Loading in 2 Seconds...

play fullscreen
1 / 16

Telescopes - PowerPoint PPT Presentation


  • 117 Views
  • Uploaded on

Telescopes. Nate Walsh. The reason I chose telescopes.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Telescopes' - keola


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
telescopes

Telescopes

Nate Walsh

the reason i chose telescopes
The reason I chose telescopes
  • Even with the most powerful telescopes imaginable, there’s a limit to how far we can see into space: In a universe that is 14 billion years old, we cannot possible see anything more than 14 billion light-years away. Beyond that-say, at a distance of 15 billion light years-we’d be looking back to a time before the universe existed, which means there’s nothing to see.
slide3
I don’t think that quite makes sense, even though our light will only be 14 billions light years away. Anything out side of that parameter would still have its light traveling toward the earth before it existed.
slide4
The light from the other galaxies doesn’t wait for the earth until it starts to send off it’s light. So wouldn’t it’s light already be on its way in this direction before the earth existed. Unless, they are suggesting that the earth was the first planet. So it seems to make more sense that telescopes can only see so far.
slide5
Maybe they are suggesting that the big bang was the start of everything. And earth is the center of where everything started.
slide6
But that doesn’t make sense either. It doesn’t seem there wouldn’t be enough matter in one explosion to create all those other galaxies. And if there is already galaxies over 14 billion light years away. That would mean their matter would’ve had to travel faster then the speed of light.
slide7
What

are

the

different

types

of

telescopes.

refracting telescopes
Refracting telescopes
  • Refracting telescope operates much like an eye, using transparent glass lenses to collect and focus light.
reflecting telescope
Reflecting Telescope
  • Reflecting telescopes uses a precisely curved primary mirror to gather light. This mirror reflects the gathered light to a secondary mirror that lies in front of it. The secondary mirror then reflects it.
reflectors
Reflectors
  • Nearly all telescopes used in current astronomical research are reflectors.
slide12
One main limiting factor used to be that the glass was too heavy to build them very large. But recent innovations have allowed them lighter glass and they can now build bigger and more powerful telescope. And are the main type they use in space.
slide14
Light collecting are – tells us how much total light the telescope can collect at one time.
  • Angular resolution – is the smallest angle over which we can tell two dots are distinct.
slide16
The purpose is because telescopes in space are above the distorting effects of the Earth’s atmosphere. So even though they are much more expensive, they see much more extensive.
ad