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Understanding the Solar System: Definitions of Stars, Planets, Moons, and More

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The solar system consists of the Sun and various objects gravitationally bound to it, including stars, planets, moons, asteroids, comets, and meteors. Stars are hot gas balls generating their own light, while planets, like Earth and Mars, revolve around stars and may possess moons. Notable planets include rocky inner planets (Mercury, Venus, Earth, Mars) and gas giants (Jupiter, Saturn, Uranus, Neptune). Each planet has unique characteristics, such as temperature, atmosphere, and the presence of life. Discover more about these celestial bodies and their differences.

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Understanding the Solar System: Definitions of Stars, Planets, Moons, and More

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  1. STARS & PLANETS

  2. DEFINITIONS- Solar System- Sun & all objects that are gravitationally bound to the Sun. Star- enormous hot ball of gas held together by gravity. Planet- an object which revolves around a star. Moon- an object which revolves around a planet. Satellite- any object which revolves around another object. Asteroid- rocky body too small to be a planet. Comet- object in space made up of ice & dust. Meteor- Chunks of burning rock & dust in our atmosphere.

  3. M y V ery E legant M other J ust S erved U s N achos Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune

  4. INNER PLANETS: Terrestrial (rocky)- OUTER PLANETS: Gas Planets:

  5. Mercury- • -- Rocky & cratered. • - No moons. • - No atmosphere. • - Surface temperature: • -170 - 400 C.

  6. Venus- • - Rocky. • - No moons. • - Closest to Earth. • - Retrograde rotation. • - Atmosphere is mostly • carbon dioxide. • - Avg. surface temp.: 460 C

  7. Earth- • - Rocky. • - One moon. • - Only planet with life. • - Only planet with water. • - Avg. surface temp.: 10 C. • - Seasons due to tilt on axis.

  8. Mars- • -- Rocky. • - Has 2 moons. • - Atmosphere thin CO2. • - Polar ice caps. • - Volcanoes & canyons. • - Has seasons. • - Avg. surface temp.: -50 C.

  9. Jupiter- • -- Gas giant. • - 63 moons + faint rings. • - Mass greater than all • other planets combined. • - No solid surface. • - Composed mainly of: • hydrogen & helium. • - Great Red Spot.

  10. Saturn- • -- Gas giant. • - 47+ moons, rings of rock & ice. • - Like Jupiter has rapid rotation, • thus it has many storms.

  11. Uranus- • -- Gas giant. • - 27 moons plus rings. • - Atmosphere mostly • hydrogen & helium. • -- Retrograde rotation.

  12. Neptune- • -- Gas giant. • - 13 moons plus rings.

  13. DIFFERENCE BETWEEN PLANETS & STARS: STARS- every star in the sky is a SUN; stars produce their own light by nuclear fusion. PLANETS- reflect light from the stars.

  14. Sun- Medium sized star Center of our solar system Part of the Milky Way Galaxy One of many stars in our galaxy

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