5 DISTANCESTRONG GRAVITATIONAL FORCEWEAK GRAVITATIONAL FORCE
6 The Formation of a Planet A star supernovas (explodes) and sends off HUGE amounts of dust and rock.The gravitational force of a large rock pulls in smaller rocks and dust.The new planet continues to “grow” until no more rocks and dust are left around it.
7 What is a solar system and what are the characteristics of ours? Solar Systems
8 ReviewOuter space contains planets, stars, natural satellites (moons) asteroids, meteoroids, and comets.
9 Solar SystemsA solar system is a collection of celestial bodies (planets, moons, asteroids, etc) orbiting a star.
10 Our Solar System Our solar system contains 1 star (the Sun) 8 planets 240 known moonsComets (giant balls of ice)Asteroids (flying space rocks)Meteoroids (small asteroids)
11 The Formation of a Planet Gravity holds a planet together in a spherical (round) shape.
13 Types of Planets The two types of planets are Terrestrial Planets – Rocky planets with a solid surface (examples: Earth, Mars, Mercury)Gas Giants – Giant planets made mostly of gas (examples: Jupiter, Saturn, Uranus)
14 Terrestrial PlanetsThe 4 planets closest to the Sun are terrestrial planets (aka: rocky planets or inner planets).MercuryVenusEarthMars
15 Asteroid BeltThe asteroid belt is a huge area containing asteroids and meteoroids located between the inner and outer planets.
16 Gas GiantsThe 4 planets furthest from the Sun are Gas Giants (aka: Jovian/outer planets).JupiterSaturnUranusNeptune
17 The Kuiper BeltThe area surrounding our solar system composed almost entirely of comets.
18 Planetary SatellitesA planetary satellite is a natural object that orbits (revolves around) a planet due to gravity.Also known as a MOON.Planets don’t always have moons.Some planets have many moons.
19 Phases of the MoonThe phases of the moon occur because of the moon’s revolution around Earth.The lit portion of the moon that we see changes depending on the position of the moon around Earth.
20 PlanetsMemory tip: “My Very Excellent Mother Just Served Us Nachos.”
21 EXIT SLIP What are the two different types of planets? What is the major difference between the inner and outer planets in our solar system.