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Astronomy and Space Science- Interactive science Ch 1
Chapter 1 Interactive science
Terms in this set (31)
an object that orbits a planet
Earth natural satelitte
an object that orbits the sun (a star), large enough to have its own gravity.
a streak of light in the sky produced by burning of a meteoroid in Earth's atmosphere
cold mixture of dust and ice that give up a long trail of light as it approaches the sun.
a giant ball of hot gas, primarily hydrogen and helium.
a pattern or group of stars that people imagined to represent a figure, animal or object
an imaginary line that passes through a planet's center and it's north and south poles
The spinning motion of a planet on it's axis.
earth rotation and revolution time
rotation is 24 hours (1 day), and revolution 365 days (1 year).
Is the movement of one object around another. Earth travel around the Sun.
1. How sun hit the earth.
2. Earth Tilted Axis.
the path of an object as it revolves around another object in space
is slightly elongate circle, or ellipse.
a system of organizing time that defines the beginning, length, and divisions of a year
either of the two days of the year on which the sun reaches it's greatest distance north or south of the equator
kind of solstice (dates)
1. winter solstice on December 21.
2. summer solstice on June 21.
either of the two days of the year on which neither hemisphere is tilted toward or away from the sun
kind of equinox (dates)
1. spring equinox on March 21.
2. Fall equinox on September 22.
a push or pull exerted on an object
the attractive force between objects; the force that moves objects downhill
law of universal gravitation
the scientific law that states that every object in the universe attracts every other object
the amount of matter in an object
the measure of the force of gravity on an object
the tendency of an object to resist change in motion
Newton's first law of motion
the scientific law that states that an object at rest will stay at rest and an object in motion will stay in motion unless a force acts upon it
one of the diff apparent shapes of the moon as seen from Earth
the partial or total blocking in one object in space by another
the blocking of sunlight to Earth that occurs when the moon is directly between the sun and Earth
the darkest part of the shadow
the blocking of sunlight to the moon that occurs when Earth is directly between the Sun and the moon
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