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RHSA Space Cadet Pledge 

RHSA Space Cadet Pledge  I solemnly swear to always look up, Whenever I step outside, And behold the wonders of the universe, Before my very eyes. *To the stars through knowledge!. Astronomy is the study of the universe and the objects in it.

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RHSA Space Cadet Pledge 

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  1. RHSA Space Cadet Pledge  I solemnly swear to always look up, Whenever I step outside, And behold the wonders of the universe, Before my very eyes. *To the stars through knowledge!

  2. Astronomy is the study of the universe and the objects in it. • The Universe is all the matter and energy that exists everywhere. The universe includes: • All stars and constellations, galaxies • Meteorites and meteors • Planets, moons and satellites • Supernovas, pulsars and quasars • Asteroids • Plasma

  3. Star Constellations We see stars in the sky • A constellation is a group of stars that forms a shape or pattern • Constellations are used for calendars, keeping time, finding one’s direction on land and at sea. • These stars appear to move from East to West across the celestial sphere. • The stars appear to move across the sky in one night, but this is just an illusion due to Earth’s ROTATION.

  4. Rotation The apparent daily motion of celestial objects is due to Earth’s rotation. Rotation is the turning of an object on its axis. Celestial objects are not actually moving from east to west across the sky, rather the earth is rotating under them.

  5. Rotations

  6. Revolution Revolution is the movement of one celestial object around another. The path along which an object travels during a revolution is called an orbit.

  7. Earth’s Revolution

  8. Stars and Planets • The solar system is made up of the Sun, and all the objects that travel around it. • The planets are NONLUMINOUS - we see them because light reflects off them (they don’t glow). • The sun and stars glow - they are called LUMINOUS

  9. Observing Stars and Planets • We can see Mercury, Venus, Mars, Jupiter, and Saturn without binoculars • The brightest star we can see is Sirius

  10. The Difference between Planets and Stars • Planets - • Are near – in our solar system • Are smaller than most stars • Reflect light from the sun • Are usually cool or cold • Are usually made of rocks or gases • Have a steady light • Wander slowly through constellations

  11. The Difference between Planets and Stars (continued) • Stars • Are very far away, past our solar system • Are usually larger than planets • Give off their OWN light • Are very hot • Are made of high temperature gases • Appear to twinkle • Move as part of a constellation

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