Warm-Up 4/30 Throwback Thursday How does each rock form? –Sedimentary –Metamorphic –Igneous Get out your Load the Shuttle questions if you did not turn in yesterday.

Celestial Objects in our Solar System Celestial- positioned in or relating to the sky, or outer space as observed in astronomy

Essential Vocabulary Rotation – the time it takes to spin on its axis This makes one DAY Revolution – the time it takes to orbit the sun once This makes one YEAR izations/es0408/es0408page01.cfm?chapter_no=visualization izations/es0408/es0408page01.cfm?chapter_no=visualization

The Inner Planets Mercury, Venus, Earth and Mars Known as terrestrial planets because they are made of rock

The Outer Planets Jupiter, Saturn, Uranus, and Neptune Gas Giants – composed mostly of Hydrogen and Helium

The Sun A ball of glowing gas! Largest thing in our solar system –99.8% of the mass of the solar system

The Moon Our moon is named Luna The moon is a natural satellite. –A satellite is anything that orbits something else.

Galilean Moons The largest of the 63 moons of Jupiter The largest of the 63 moons of Jupiter Discovered by Galileo Galilei on Jan. 7, 1610 Discovered by Galileo Galilei on Jan. 7, 1610

Galilean Moons Among the most massive rocky objects in the Solar System, with a radius larger than Mercury or any of the dwarf planets.

Galilean Moons IoIo the most geologically active object in the Solar System Io EuropaEuropa has a layer of ice Europa GanymedeGanymede largest natural satellite in the Solar System and has a salt water ocean and oxygen in it’s atmosphere. Larger than Mercury. Ganymede CallistoCallisto may have possibly a subsurface ocean of liquid water Callisto

Meteoroids Meteoroids are rocky fragments of comets, planets, moons, or asteroids. Meteoroids are rocky fragments of comets, planets, moons, or asteroids. Travel through space without an orbit. Travel through space without an orbit.

Meteors Meteors that have entered an atmosphere Meteors that have entered an atmosphere Friction with the molecules in the atmosphere cause it to burn Friction with the molecules in the atmosphere cause it to burn Commonly called “shooting stars” Commonly called “shooting stars”

Meteorites Any part of a meteoroid that survives passage through the atmosphere and lands on the surface a planet or moon. Any part of a meteoroid that survives passage through the atmosphere and lands on the surface a planet or moon. Largest meteorite found on Earth Hoba, Namibia

Comets Mixture of ices (both water and frozen gases) dust, and rocks Mixture of ices (both water and frozen gases) dust, and rocks Have an elliptical orbit around the sun Have an elliptical orbit around the sun

Asteroids Left over materials from the formation of the Solar System Left over materials from the formation of the Solar System Composed of rock or metal Composed of rock or metal Smaller than a planet but larger than a meteor Smaller than a planet but larger than a meteor

Asteroid Belt Most asteroids are located in the asteroid belt between Mars and Jupiter Most asteroids are located in the asteroid belt between Mars and Jupiter

Video Asteroids, Comets, and Meteors Asteroids, Comets, and Meteors Asteroids, Comets, and Meteors Asteroids, Comets, and Meteors