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Space, Sun and Moon

Science

Space, Sun and Moon Chapter Video

Space, Sun and Moon Chapter Video

astronomy

the study of all things in space, like the Sun, stars, and planets
astronomy Simple Definition

axis

the imaginary line around which Earth rotates, it runs through Earth from pole to pole
axis Simple Definition

crater

a large pit on Earth or any object in space, created by an impact from a smaller object
crater Simple Definition

electromagnetic spectrum

all the wavelengths or frequencies of electromagnetic radiation
electromagnetic spectrum Simple Definition

equinox

the two days a year when the Sun is directly over the equator, making day and night equal
equinox Simple Definition

gravity

the attractive force between all objects that have mass
gravity Simple Definition

lunar eclipse

occurs when Earth’s shadow falls on the moon
lunar eclipse Simple Definition

maria

dark, flat regions on the Moon made of ancient lava flows
maria Simple Definition

moon phase

changes in the shape of the moon as seen from Earth
moon phase Simple Definition

observatory

a building that contains one or more telescopes used to observe space
observatory Simple Definition

orbit

the path of one body around another, like Earth’s orbit around the Sun
orbit Simple Definition

penumbra

a region of lighter shadow around the darkest part of a shadow
penumbra Simple Definition

radio telescope

a device that detects and records radio waves from space
radio telescope Simple Definition

reflecting telescope

a telescope that uses concave mirrors to reflect and focus light from distant objects
reflecting telescope Simple Definition

refracting telescope

a telescope that uses convex lenses to focus light from distant objects
refracting telescope Simple Definition

revolution

the motion of one body around another, like the Earth around the Sun
revolution Simple Definition

rocket

a device that burns fuel, and expels gas in one direction to move in the opposite direction
rocket Simple Definition

rotation

the turning of a planet on its axis
rotation Simple Definition

satellite

an object that moves around a larger object in space, like the moon around Earth
satellite Simple Definition

solar eclipse

occurs when the moon’s shadow falls on Earth
solar eclipse Simple Definition

space probe

a spacecraft that carries scientific instruments, but no human crew
space probe Simple Definition

space shuttle

a reusable craft that can carry crew and cargo between Earth and space
space shuttle Simple Definition

space station

an artificial satellite on which people can live and work for long periods
space station Simple Definition

telescope

a device that makes distant objects appear closer
telescope Simple Definition

thrust

the pushing force exerted by the engine of an aircraft or rocket
thrust Simple Definition

umbra

the darkest part of a shadow
umbra Simple Definition

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