Space

Why are many large optical telescopes located on mountains?

• it is cheaper to build on mountains

• to be above part of the atmosphere

• because it is easier to build telescopes on mountains

• to be closer to city lights

A device that detects radio waves from objects in space is called a(n)

• radio telescope.
• reflecting telescope.
• refracting telescope.
• electromagnetic telescope.

Why do we use the entire electromagnetic spectrum to study space?

• Because the visible spectrum is such a small part of light we are missing out by not doing so.
• So we can determine the direction galaxies are moving
• So we can understand the nature of time.
• So we can see the composition of galaxies

Why must Ultra-Violet observing be done in space?

• The ozone blocks most of the UV rays in the surface.
• It’s hard to know exactly where the ozone hole will be to find UV images
• It’s hard to use UV telescopes and radio telescopes together on the surface.
• It’s hard to use UV X-Ray telescopes and radio telescopes together on the surface

What color has the longest wavelength?

• Red
• Orange
• Green
• Blue

What color has the shortest wavelength?

• Blue
• Red
• Green
• Yellow

Why is the Hubble telescope located in space?

• So it can be closer to the stars it magnifies
• They have very large optical lenses
• So its images arent distorted by Earth's atmosphere 
• So it can be operated by astronauts 

If a star is being observed from Earth and it's light has shifted towards the blue side of the electromagnetic spectrum it would be...

• Moving towards the Earth
• Moving away from the Earth
• This is a trick question that cannot be answered
• It isn't a star, it is a very large blueberry.

If a star is being observed from Earth and it's light has shifted towards the red side of the electromagnetic spectrum it would be...

• Moving towards the Earth
• Moving away from the Earth
• This is a trick question that cannot be answered
• It isn't a star, it is a very large strawberry.

light emitted from an object moving towards you will have its wavelength shorted and will be considered

• red shiffted
• blue shiffted