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Planets_Asteroids

QuestionAnswer
Mercury Has little to no atmosphere, Smallest planet, Fastest revolution
Venus Hottest planet, Earths twin, Rotates in opposite direction (retrograde), Day is longer than its year, Thick atmosphere of carbon dioxide
Earth 78% Nitrogen and 21% oxygen, Densest planet, Has one moon
Mars Thin atmosphere of carbon dioxide, Has two moons
Inner Planets also called terrestrial planets: Mercury, Venus, Earth, and Mars (planets closest to the sun). These planets are solid, rocky, dense, and small.
Outer Planets Gas Giants: A large, massive, low-density planet composed primarily of hydrogen, helium, methane, and ammonia in either gaseous or liquid state.
Jupiter Largest planet, Rotates the fastest (day), Red spot (massive hurricane-like superstorm)
Saturn Is the least dense of all planets. Has rings made of mostly rock and ice with some large dust particles.
Uranus Tipped on side (Early Comet Strike)
Neptune Outermost gas planet - Called The Ice Giant
Pluto Its highly elliptical orbit overlaps with that of Neptune. It will now join a new category of dwarf planets (Ceres and Eris)
Rotation An object rotating around on its axis (imaginary line). Day
Revolution The time it takes an object to make a complete orbit. Year
Comet A frozen mass (3-5 mile diameter) that travels around the sun in a highly elliptical orbit.
Tail (Comet) Vaporized gas and dust pointing AWAY from the sun (solar wind blows the tail away from the sun). o ice begins to melt as it approaches the sun o responsible for meteor showers
Asteroid Belt between Mars and Jupiter
Asteroids rocky and metallic objects that orbit the sun but are too small to be considered planets.
Meteoroid Debris located outside Earth’s atmosphere.
Meteor When a meteoroid is located within Earth’s atmosphere and often burn up in the atmosphere leaving a streak of light.
Meteorite Meteoroids that don’t burn up in the atmosphere and strike the Earth forming craters. Often broken up into smaller pieces as it enters the atmosphere and before it reaches Earth’s surface.
Yuri Gagarin Soviet Union was the first country to send a man into space.
Sputnik First artificial satellite to orbit Earth
Neil Armstrong First man to walk on the moon
Apollo 11 Spaceflight that landed first humans on the moon. Americans Neil Armstrong and Buzz Aldrin walked on the Moon on July 20, 1969.
Created by: jadams2021
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