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Space Flight to the Stars

Dive into the wonders of celestial objects, including the Sun, Moon, planets, and stars. Understand the structure of our Solar System, from the Inner planets like Mercury and Venus to the Outer giants like Jupiter and Saturn. Learn how to remember their order with mnemonics and discover other fascinating celestial entities, including asteroids and comets. Explore the vast measurements of space, such as astronomical units and light-years, and uncover the life cycles of stars, including supernovae and nebulae, where new stars are born.

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Space Flight to the Stars

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  1. Space Flight to the Stars

  2. Celestial Objects • “Celestial” means sky • Objects we can see in the sky such as the Sun, Moon, Earth and other planets are all examples of celestial objects

  3. Solar System • The Sun together with all the planets and other celestial objects that are held by the Sun’s gravitational attraction and orbit around it.

  4. Inner Solar System • The planets in order from the Sun are: • Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, (Pluto) • You can easily remember the order using this mnemonic device: “My Very Educated Mother Just Served Us Nine Pizzas” • Planets of the Inner Solar System include: Mercury, Venus, Earth and Mars

  5. Outer Solar System • The planets that make up the Outer Solar System are: • Jupiter, Saturn, Uranus, Neptune

  6. Other Celestial Objects • Star – a hot ball of plasma; the Sun is a star in which nuclear fusion reactions occur to produce enormous amounts of energy • Asteroid Belt – past Mars there is a region of rocky debris that forms a ring around the Sun • Moons • Comets • Minor Planets - Pluto

  7. Measurements in Space • Astronomical Units – measures distances in space. 1 AU = average distance between the Sun and Earth (about 150 million km) • Light-year (ly) – the distance that a beam of light can travel through space in 1 year. It is about 63 000 AU or 9000 billion km. • At the speed of light you can travel around the Earth 7 times in 1 second!

  8. Stars • Supernova – occurs when a star explodes • Nebula – large cloud of dust and gas; “star nurseries”, because stars develop from their dust and gas

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