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Greenfield-Astrono#1

Astronomy #1

TermDefinition
Spring tide The tidal extreme caused by the Earth, moon, and sun in a straight alignment
Neap tide Weaker tidal range caused by the Earth, moon, and sun in a perpendicular (not straight) alignment
23.5 degrees The tilt of the Earth on its axis and the reason that seasons exist on Earth
Winter In the Northern Hemisphere, Earth is closest to the sun in which season?
Electromagnetic radiation The name of the waves that travel from the sun
Solar system A set of planetary bodies orbiting around a star
Earth The 3rd planet in our solar system
Sun The source of all energy on Earth
Black holes Only the most massive stars become _______ _______when they die.
Andromeda The next closest galaxy to ours
Spiral The shape of the milky way galaxy
Billions maybe even trillions The number of stars that are in a galaxy
Milky Way The name of our galaxy
Blue giants The hottest and brightest stars
Red giants The cool, bright stars that are the end of a star's life cycle
White dwarfs Small, white, dim stars
Mercury, venus, earth, mars, jupiter, saturn, uranus, neptune, pluto The planets in our solar system from closest to the sun to the farthest
My very educated mother just served us nachos A way to remember the order of the planets?
Equinox Happens in the spring and fall when day and night are of equal length
Solstice Happens in the winter and summer when we have the longest and shortest days of sunlight
Our solar system consists of these bodies The sun, planets, dwarf planets, moons, meteors, comets, stars, and asteroids
Planet An object that is round, orbits the sun, and has cleared out the region of the solar system along its orbit
Dwarf planet An object that orbits the sun and has enough gravity to be spherical, but has not cleared the area of its orbit.
Astronomical unit Used to measure the long distances in space. One AU equals the average distance between Earth and the sun, about 150,000,000 KM
4.6 billion years ago This is when scientist believe the solar system formed
A cloud of hydrogen, helium, rock, ice, and other materials pulled together by gravity Widely believed that this is what the solar system is formed from
Planetesimals Rock, ice and gas pulled together by gravity that formed these small bodies
Created by: pattigreenfield
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