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Solar System
Solar System

... Our solar system is made up of the nine planets and other objects orbiting the sun. The solar system is estimated to be about five million years old and there are many theories on how the solar system was formed. Our Solar System Planets Mercury Mercury is the closest planet to the sun at 57.9 milli ...
Solar System
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... Our solar system is made up of the nine planets and other objects orbiting the sun. The solar system is estimated to be about five million years old and there are many theories on how the solar system was formed. Our Solar System Planets Mercury Mercury is the closest planet to the sun at 57.9 milli ...
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... 3. Write the definition of “revolution” on the board as the motion of planets traveling around the sun in a roughly circular path (1 planetary year) and the definition of “rotation” as the spinning motion of a planet on its on axis (1 planetary day). 4. Use the Popplet to show students the order of ...
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... great as the Earth's diameter. • About 1.3 million Earths could fit inside the sun. • The mass of the sun is 2 x 1030 kilograms, about 332,000 times the mass of the Earth. • Volume of the Sun is about 1.5 million times that of Earth’s • Mean density of Sun = 1408 (kg/m3) • Mean density of Earth = 55 ...
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... Therefore you can see the silhouette (shape) of the Earth as its outline falls on the moon. When the Earth enters the shadow, you see one side and when it leaves, you see the other side. The shape is always circular. ...
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... The  first  page  on  the  graphs  handout  shows  observations  of  the  spectrum  of  another   star,  similar  to  the  Sun  but  far  more  distant,  over  the  course  of  a  year,  as  seen  from   the  Earth.    The  wave ...
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... 2. Which of the following BEST describes Earth’s location in the universe? A. Earth, Solar System, Sun B. Milky Way Galaxy, Solar System, Earth C. Solar System, Milky Way Galaxy, Sun D. Milky Way Galaxy, Earth, Solar System 3. What are stars, planets, and moons part of? A. Black Holes B. Comets C. N ...
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... around and did not follow the paths of the normal stars. They called them Wander Stars “planets”. 2. “Wandering Stars” were: Mercury, Venus, Mars, Jupiter and Saturn 3. Greek Astronomer Ptolemy (pronounced “tall-oh-me) believed: Geocentric - Earth centered Solar system 4. Copernicus: Polish Astronom ...
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Astronomical unit

The astronomical unit (symbol au, AU or ua) is a unit of length, roughly the distance from the Earth to the Sun. However, that distance varies as the Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally conceived as the average of Earth's aphelion and perihelion, it is now defined as exactly 7011149597870700000♠149597870700 meters (about 150 million kilometers, or 93 million miles). The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System or around other stars. However, it is also a fundamental component in the definition of another unit of astronomical length, the parsec.
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