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SPACE OBJECT Planets NOTES: Oct. 2-3 What is a planet: a celestial body moving in an elliptical orbit around a star. The order of planets from the Sun, outward: Mercury Fun Fact: Inner Planets _________________ is the _____________ hottest planet: Why? Size: Earth Mars _________________ Saturn _________________ _________________ Each planet _________________ around the Sun and _________________ on it’s axis Composition: Temperature: Outer Planets Size: Composition: Temperature: Moons What is a moon: A rocky body covered with craters that orbits around a ____________________ Fun Fact: **Moons revolve around ______________________ and rotate on their axis. Earth only has _______________ moon. How long does it takes our Moon to revolve: ______________ How long does it takes our Moon to rotate: _____________________ Planet with the MOST moons: ________________________(63) Planets with the LEAST moons: _____________________________ and ______________________________ (0 moons) Asteroids Fun Fact: What is an asteroid? Rocky bodies that orbit in the Asteroid Belt Where is the Asteroid belt located? Size: Asteroids vary in size and shape Largest: Smallest: Movement: Asteroids revolve around the ________________ Why do scientists monitor their positions? Meteoroids Fun Fact: Meteoroid: chunks of rock that move around within the solar system Meteor: chunks of rock from space that ________________ up when entering a planet’s atmosphere Meteors are often called _______________________________________. Shooting stars are actually just ___________________________. Meteorite: chunks of rock from space that __________________ a planet or moon Comets Fun Fact: Comets have 2 parts: HEAD: made of _____________________________________________ TAIL: happens when the comet gets closer to the sun during it’s orbit and the head begins to melt & stream behind it ****Tail always faces _______________ from the sun due to solar winds Orbit shape: Long, narrow and ________________________ -Most come from regions far beyond Neptune * ________________ Cloud or Kuiper Belt