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28 Cards in this Set
- Front
- Back
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Meteoroid |
a small particle from an asteroid orbiting the sun |
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meteor |
A meteoroid that is observed as it burns up in the earths atmosphere |
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meteorite |
A meteoroid that has survived its passage through the earths atmosphere and impacts the earth |
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Planet |
large, round celestial body that orbits around a star, must dominate its orbit |
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Asteroids |
Small celestial object in solar system composed of rock and metal. Located in asteroid belt |
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Dwarf planet |
Planets that orbit around the sun, have spherical shape but don't dominate their orbits |
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Rotational period |
The time it takes a celestial object to complete one revolution around its axis of rotation |
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Astronomical unit |
The average distance between the sun and earth: 150,000,000km |
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Galaxy |
A huge rotating collection of gas,dust and billions of stars, planets and other celestial objects |
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Satellite |
A celestial object that travels around a planet or dwarf planet |
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Astronomy |
The scientific study of what is beyond earth |
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Gps |
Gps satellites travel in medium earth orbits about 11,000km. They aid in navigation by transmitting signals down to Earth |
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Star |
A massive celestial body composed of hot gases that radiates large amounts of energy |
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Celestial body |
Any natural body outside of the earths atmosphere |
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Light year |
distance light travels in vacuum in 1 year |
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Nuclear fusion |
Reaction in which nuclei fuse to form a heavier nucleus that releases large amounts of energy |
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Comet |
A chunk of ice and dust that travels in a long orbit around the sun |
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Luminosity |
The total amount of energy produced by a star |
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Orbital period |
The time it takes to complete one full orbit around another celestial body |
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Solar eclipse |
SUN --- MOON --- EARTH Blocks sun to be observed from earth Only possible during new moon phase |
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Low earth orbit satellite |
Up to 2000 km and is required to see every part of the planet |
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Medium earth orbit satellite |
Travels 30,000 km and is used for GPS |
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Geostationary earth orbit satellite |
Orbits at a distance of 35,790km. Appears motionless in the sky. Is used to track weather |
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Why do we only see once side of the moon |
Because the moons rotational period and orbital period are both the exact same |
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Why do we have seasons |
Because the earth is tilted as it orbits. The earths axis is tilted at 23.5 degrees. |
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What causes tides |
By the gravity of the moon and go a lesser extent, the sun. This causes a bulge of water to form on the sides of the earth facing the moon |
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Lunar Eclipse |
SUN --- EARTH --- MOON The moon is in the earths shadow. Appears red or orange |
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How do satellites stay in orbit |
The forward motion and I curvature of the earth along with the velocity of the satellite when launched |
