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29 terms

Earth and Beyond

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Moon
any natural satellite of a planet
rotation
spinning of Earth on its imaginary axis, which takes about 24 hours to complete and causes day and night to occur
Constellations
groups of stars
Universe
everything that exists, including the sun, stars, all the planets, and outer space
Planet
any of the celestial bodies (other than comets or satellites) that revolve around the sun in the solar system
Gravity
the force that pulls objects toward each other
solar system
sun, planets, and all the other objects that revolve around the sun
star
any celestial body visible (as a point of light) from the Earth at night
atmosphere
the envelope of gases surrounding any celestial body
astronauts
a person trained for space flight
meteors
smaller chunks of small matter, that burn up in our atmosphere called shooting stars
comet
A ball of frozen dust and rock that orbits the sun and has a tail that glows
telescope
a device built to observe distant objects by making them appear closer
astronomy
When the Moon has only a small part that is lit, it is called this., the study of the moon, stars, and other objects in space
axis
the center around which something rotates
sun
a typical star that is the source of light and heat for the planets in the solar system
Axis of Rotation
The imaginary line about which a turning body such as the earth rotates
Galaxy
(astronomy) a collection of star systems
Eclipse
An event during which one object in space cases a shadow onto another
Equinox
In an orbit, a position and time in which the sunlight shines equally on the northern and southern hemisphere
Solstice
In an orbit, a position and time during which one hemisphere gets its maximum area of sunlight, while another hemisphere gets its minimum amount of sunlight
Mercury
the smallest planet and the nearest to the sun
Venus
the second nearest planet to the sun
Earth
the 3rd planet from the sun
Mars
the 4th planet from the sun
Jupiter
the largest planet and the 5th from the sun
Saturn
second-largest and sixth planet from the sun
Uranus
seventh planet from the Sun
Neptune
the eighth planet from the Sun