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25 Cards in this Set
- Front
- Back
- 3rd side (hint)
What is the name of the bright star in this constellation?
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Deneb.
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Constellation: Cygnus |
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Which of the following electromagnetic waves has the most energy?
infrared, ultraviolet, visible light, or radio waves? |
Ultraviolet
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True or False: The biggest telescopes in use today are refracting telescopes.
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False; Recall that refracting telescopes are those that use lenses to focus light. Larger lenses are very difficult to make and are very fragile. The biggest telescopes are actually reflecting telescopes. Reflecting telescopes use curved mirrors to focus light.
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What causes the Earth to have seasons?
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The tilt of Earth’s axis allows direct sunlight to hit different places throughout the year.
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Identify the constellation.
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Ursa Minor
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How fast do radio waves travel?
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300,000 km/s
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What is a tiny bundle of electromagnetic energy called?
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Photon
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On March 21 the Sun is directly above which location?
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The Equator
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The distance from the earth to the Sun has been called...?
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The Astronomical Unit
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True or False: The Hubble Space Telescope gives us much better images than Earth–based telescopes because it is much larger than Earth–based telescopes.
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False; The Hubble Space Telescope gives better images because the light reaching it does not have to travel through Earth’s atmosphere.
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True or False: All types of electromagnetic waves travel at the same speed in a vacuum.
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True; All types of electromagnetic waves travel at the speed of light (300,000 km/s) in a vacuum.
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True or False: Light leaving the earth would take a little more than one second to reach the Moon, 400,000 km away.
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True; Recall that light travels at 300,000 km/s. Light would travel 300,000 km in one second and would then be only 100,000 km away from the Moon. It would take less than half a second to cover the rest of the distance. So light would take a little more than one second to reach the Moon, 400,000 km away.
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True or False: The number of times you will orbit the Sun in your lifetime will be the same as the number of days in your life.
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False; Number of years.
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True or False: The amount of light collected by a telescope is proportional to the area of its aperture.
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True
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The apparent daily motion of the Sun, Moon, and stars from east to west is caused by what?
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Earth's rotation
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Two types of telescopes are...?
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Reflecting and refracting
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True or False: Reflecting telescopes often suffer from spherical aberration.
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True; Spherical aberration refers to the fact that a spherically polished mirror does not bring all light to a sharp focus. This only occurs in reflecting telescopes.
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The bright star Polaris belongs to which constellation?
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Ursa Minor
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The bright star Vega belongs to which constellation?
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Lyra
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The bright star Deneb belongs to which constellation?
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Cygnus
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The bright star Algol belongs to which constellation?
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Perseus
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The bright star Altair belongs to which constellation?
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Aquila
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What constellation is this?
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Cygnus
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The best way to obtain astronomical data is...?
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Use a telescope in space.
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Who was the first person to realize that mirrors could be used to construct a telescope?
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Isaac Newton
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