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Studying Space
Early Astronomers, Telescopes, EM Spectrum
| Question | Answer |
|---|---|
| A wavelength of electromagnetic radiation on the electromagnetic spectrum is also known as | Light |
| Explain redshift | the shift of an object's spectrum towards red light. It indicates that objects are moving away. |
| Who discovered redshift? | Edwin Hubble |
| What is a drawback of a refracting telescope? | Lenses can only be so big- if they're too large they sag under their own weight and images are distorted. |
| Where is the best place for a telescope on Earth. Why? | Hawaii; it is high in altitude, low light pollution, low air pollution. |
| A telescope that bends light using lenses. | Refracting Telescope |
| Why do astronomers put telescopes into space? | to avoid interference from Earth's atmosphere. |
| What are some advantages of reflecting telescopes? | Use mirrors so can get perfectly focused images mirrors can be very large shows all colors of light clearly |
| A telescope that bounces light off of mirrors. | Reflecting |
| What are 3 ways that early civilizations used the heavens? | Religion, Navigation, Tracking Time |
| A telescope that observes the wavelengths of light that we cannot see with our naked eye. | Non-optical |
| Celestial Sphere | an imaginary sphere that surrounds Earth. We put all celestial objects on that sphere. |
| Who created the sun-centered theory of the universe? | Copernicus, the Polish priest-astronomer |
| Isaac Newton is famous for... | the invention of calculus his discovery of gravity: he determined that gravity keeps planets and moons in orbit. |
| Kepler's Law of Motion about planet orbits states that they move in _________________________ orbits around the sun. | elliptical |
| One of the first astronomers to use a telescope | Galileo |
| The early astronomer who believed the the Earth was the center of the Universe | Ptolemy & Aristotle |
| Why might it be beneficial to link radio telescopes? | By linking telescopes, we can get a much bigger picture of the sky, therefore finding out more information about it. |
| Einstein came up with this theory to explain gravity. | General Theory of Relativity |
| NuStar Studied which wavelength of EM radiation to observe black holes? | X-rays |
| Heliocentric | Heliocentric = sun-centered Universe |
| Geocentric | Geocentric = earth-centered Universe. |
| An explosive theory for how the universe began. | The Big Bang Theory |
| What is the distance that light can travel in one year? | A light Year |
Created by:
hryan
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