P1.13 Exploring The Universe Flashcards
When photography was invented that amount of data that could be gathered with these telescopes…
Increased
What did early telescopes let people see?
Objects that emitted visible light.
How are objects recorded that are too faint to be seen by looking through a telescope?
They can be recorded as a photograph. By pointing the telescope at the same spot in the sky for several hours.
How do modern telescopes work?
They use digital cameras to record images and computers are used to analyse the images and look for new objects
Why can spectrometers be attached to telescopes?
To analyse different wavelengths of light given off by stars and galaxies
Most objects that astronomers observe give out…
Energy in all parts of the electromagnetic spectrum
What can modern telescopes be designed to detect?
Almost any part of the electromagnetic spectrum, showing us that things can’t be detected using visible light
When was the Hubble space telescope put in the orbit around the earth?
1990
What can the Hubble Space Telescope produce?
Very clear and sharp images of stars and galaxies because it is above the atmosphere
Why is it a good thing that the Hubble Space Telescope is above the atmosphere?
Because light waves from space are not reflected or refracted by clouds and dust or even by movements of air in the atmosphere.
Why are other telescopes put in the orbit?
Because the atmosphere absorbs gone wavelength of the radiation they are designed to detect. If these telescopes where on earth they wouldn’t detect anything
What is visible light?
Electromagnetic waves that can be detected by the human eye
Electromagnetic spectrum is the…
The entire frequency range of electromagnetic waves
X-Rays…?
Electromagnetic radiation that has a shorter wavelength than UV but longer than gamma rays
What is ultraviolet?
Electromagnetic radiation that has a shorter wave length than visible light but longer than x-Rays
