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Astronomy 1:1
Ch. 1 Sec. 1 Earth in Space
| Question | Answer |
|---|---|
| Astronomy | The study of outer space and objects in it |
| Revolution | The time it takes an object to travel around the sun |
| Orbit | The path an object takes as it revolves around another object. Earth's orbit as it travels around the sun is an ellipse. |
| Rotation | The spinning motion of Earth or any object in space, like a top on its axis |
| Seasons/Days | These changes are caused by the change in the angle of the sunlight hitting the Earth as it travels around the sun. |
| Axis | The imaginary line around which the Earth rotates, extending through the poles |
| spherical | shaped like a ball or a globe |
| Solstice | The two days of the year on which the noon sun is directly overhead at either 23.5 degrees S or 23.5 degrees N. |
| Equinox | The two days of the year on which neither hemisphere is tilted toward or away from the sun |
| Vernal Equinox | The day of the year that marks the beginning of spring in the Northern Hemisphere. |
| Autumnal Equinox | The day of the year that marks the beginning of fall in the Northern Hemisphere. |