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space unit vocabular
space unit
Term | Definition |
---|---|
meteor | a streak of light in the sky produced by the burning of a meteoroid in earth;s atmosphere |
astreroid belt | any of thousands dence rocks objects in orbit around the sun between Mars and Jupiter. |
comet | A ball of ice, dust, and frozen gases that orbits the sun. |
revolution | the movement of an object around another object. |
rotation | the spinning motion of a planet on its axis. |
outer planets | gas giant planets found outside of the asteroid belt. |
inner planets | terrestrial (earth-like) planets that are dense solids located between the sun and the asteroid belt. |
gravity | the attractive force between two objects. |
axial tilt | the invisible axis that are tilted allowing for seasons to occur. |
probe | a robotic spacecraft that leaves Earth’s orbit and explores space. |
satellite | any object that revolves around another object in space. Can be artificial or natural like the moon |
Heliocentric Theory | Nicolaus Copernicus’ idea that the Earth, planets, and stars all revolved around the Sun. |
Geocentric Theory | Aristotle & Ptolemy believed that the Earth was the center of the Universe and all objects revolved around it. |
tides | the rise and fall of sea levels caused by the combined effects of gravitational forces exerted by the Moon. |
greenhouse effect | is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without an atmosphere. |
illuminated | to light up The moon is illuminated by the sun. |
celestial objects | Known collectively by astronomers as celestial bodies, astronomical objects, and astronomical bodies, they are the stuff that fills the empty space of the universe. |
lunar eclipse | occurs when the Earth is between the sun and moon. Sunlight is blocked by the Earth. |
solar eclipse | occurs during the NEW MOON PHASE when the moon passes between the Sun and Earth, and the moon fully or partially blocks the Sun. |