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Related Flashcards
Cards In This Set
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A light year is the distance that light travels in one year
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Almost everything we know about the universe comes from radiation traveling in space
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The ecliptic is the path of the sun across the sky during the course of a year
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The backwards motion of the planets in the sky is called retrograde motion
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Light from the earth that reflects back to the moon is called earth shine
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The ability to distinguish between details is called resolution
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Energy composed of rapidly varying electic and magnetic firlds that has become detached from its source is electro-magnetic radiation
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A simple refracting telescope consists of a lens at one side and an eye piece at the other side
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The telescope characteristic that is often advertised in stores bus has little impact on its performance is magnification
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An important factor in the ability for an astronomer to observe the sky is its transparency which is how clear the sky is
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A reflecting telescope with a large mirrior is different than a telescope with a small mirror because the one with the large mirror has better light gathering power and better resolution
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Sometimes big grouping of stars are not called constellations but are called asterisms
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There are 88 constellations
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Stars twinkleplanets don't
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The 1st day of spring in march is called the vernal equinoz
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If you are standing on the equator the stars would move perpendicular in respect to the horizon
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A simple relatively cheap telescope is called a Dobson ian telescope
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The instant th sun reaches its fathest point north on the celestrial sphere is called the summer solstice
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Standard time is based on the mean solar day
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Light that we receive from the sun comes from its photoshere
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Dark cool regions on the photoshere of the sun are called sunspots
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For an earth bound observer, when the moon is at opposition to the sun and in the plane of the ecliptic the result is a total lunar eclipse
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When no sunlight is falling on the side of the moon facing earth it is called new moon
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Plate tectonics is the motion of section of the earth crust moving across the lithosphere
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Most UV radiation does not reach the surface of the earth becasue of the Ozone layer
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Charged particles trapped in the earths magnetic field are auroras (northern lights)
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Smooth flat surfaces on the moon are called maria
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The rate of rotation of the moon on its axis is the same as its rate of revolution around the earth
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The line that seperates the day and night of the moon is the terminator
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Most lunar craters are formed by metorite impacts
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