Observing the sky, orbits and gravity
The celestial sphere and the constellations, the birth of astronomy from Ptolemy to Kepler and Newton, orbital motion, and the cycles of seasons, moon phases, tides and eclipses.
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Front accelerateBack to change velocity; to speed up, slow down, or change direction.
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Front angular momentumBack the measure of the motion of a rotating object in terms of its speed and how widely the object’s mass is distributed around its axis
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Front aphelionBack the point in its orbit where a planet (or other orbiting object) is farthest from the Sun
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Front apogeeBack the point in its orbit where an Earth satellite is farthest from Earth
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Front apparent magnitudeBack a measure of how bright a star looks in the sky; the larger the number, the dimmer the star appears to us
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Creative Commons Attribution 4.0 International
CC-BY-4.0 - Attribution
- Source : https://openstax.org/books/astronomy/pages/preface — Licence : Creative Commons Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/)
- Source
- OpenStax — Astronomy (first edition)
- Retrieved on
- Topic
- Astronomy
- Language
- English
- Version
- 3
- Updated on
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