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15 terms

Astronomy

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Day
the time it takes for a planet to make a turn (rotation) on its axis (from one solar noon to another)
Year
the time it takes for a planet to make one revolution around the sun
Lunar month
The time it takes for the moon to revolve one time around the Earth (~29.5 days)
Gravity
the force of attration between all masses; dependent on two things: mass of the objects and distance between objects
Inertia
the tendency of a moving object to continue in a straight line or a stationary object to remain in place unless acted on by an outside force (like gravity)
Sun
A medium-sized star, one of billions, and closest to us (a yellow dwarf star)
Solar System Mnemonic
My Very Eagar Mother Just Served Us Nachos (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune)
Astronomical Unit (AU)
the average distance between the Earth and the Sun, or approximately 150,000,000 km (93 million miles)
Rotation (picture)
Revolution (picture)
Gravity (picture)
shown by line #2
Inertia (Picture)
shown by line #1
Revolution (pic)
shown by line #3
Altitude
the angle of an object (sun, star, etc.) above the horizon
Horizon
where the earth meets the sky