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31 Cards in this Set
- Front
- Back
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1.
Star |
Huge ball of superheated gases
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2.
Sun |
The star at the center of our solar system
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3.
Sun... (5 points about the sun) |
* Largest object in the solar system
*The source of most energy on Earth * Life could not exist without it * Made up of gasses... mostly H and He * has hotspots and solar flares, appear on the sun & last only a few days |
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4 .
Alpha Centouri |
The 3 stars closest to our solar system
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5.
The Color of stars tells us about their temperature |
Red = Coolest
Yellow = Middle...(the sun is a medium-sized yellow star) Blue = Hottest |
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6.
Stars.... |
Go thru stages where clouds of spinning dus and gas get squeezed by gravity, then change into light and heat
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7 .
Constellations |
Groups of stars... that form imaginary pictures in the sky
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8 .
** Ancient people gave constellations names |
** Patterns serve as landmarks in the sky, used by sailors
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9 .
Milky Way |
The galaxy in which our solar system lies.
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10 .
Galaxy |
A huge system of gases, dust and stars.
* they contain billions of stars *Can be spiral shaped, look like balls or eggs, or have NO regular shape |
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11 .
Universe |
Everything that exists in space
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12.
... Seasonal Star Positions ... The sun appears to rise in the Ease |
... And set in the West... The Earth is actually moving
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13.
The positions of the stars appear to chage with the seasons |
Caused by Earth revolving around the sun
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14.
We see different parts of space at different times of year |
... Where you LIVE determines the constellations you will see. N. Hemisphere sees different stars than S. Hemisphere
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15.
Solar System |
A group of objects in space that revolve around a star in the center, plus the star itself
... The sun is the star in our solar system |
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16.
Planet |
A large object that orbits a star
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17.
Moon |
A smaller object that orbits a planet
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18.
.... There are 8 planets in our solar system. ... They are grouped as..... |
Inner planets...(closer to the sun)
Outer Planets...(Further from the sun) ... They are seperated by a ring of asteroids between mars & Jupiter |
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19.
Inner Planets... Small rocky surfaces, no more than 2 moons) |
Mercury
Venus Earth Mars |
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20 .
Mercury |
Closest planet to the sun
** About the size of the earth's moon |
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21.
Venus |
The third brightest object in the sky
*... About the size of the Earth |
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22.
Earth |
* Only planet that is known to have life
* Only planet whose surface is mostly water |
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23 .
Mars |
Called the Red planet... because it looks red from Earth
* Huge dust storms that last for months |
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24.
Outer Planets... Huge, made mostly of gases, many moons |
Jupiter
Saturn Uranus Neptune |
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25.
Jupiter |
Larget planet in our solar system
... Great red spot ... at least 63 moons |
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26.
Saturn |
**... Rings are visible from Earth through a telescope... at least 31 moons
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27.
Uranus |
Rotates on its side as it orbits the sun
... at least 27 moons |
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28.
Neptune |
Very windy... one of the windiest in our solar system
.... Atmosphere is hydrogen and helium |
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29.
Pluto |
Is a Dwarf planet.
... Unlike the other outer planets ...WAS the 9th. planet for over 80 years.... scientists decided it is NOT a planet because it is not in a clear orbit around the sun |
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30 .
Asteroids |
... Orbits the sun
... bits of rock and metal ... between 1 and 1000 km in diameter ... most are found in a belt between mars and Jupiter |
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31.
Comets |
A ball of rock, ice and frozen gases
... Most are less than 10 km across ... As comets come nearer the sun, the sun heats the tail making it look like a fiery tai and may be visible from Earth. |
