RHSA Space Cadet Pledge RHSA Space Cadet Pledge 

I solemnly swear to always look up, I solemnly swear to always look up, Whenever I step outside, Whenever I step outside, And behold the wonders of the universe, And behold the wonders of the universe, Before my very eyes.Before my very eyes.

*To the stars through knowledge!*To the stars through knowledge!

Astronomy is the study of the universe and the objects in it.Astronomy is the study of the universe and the objects in it.

The Universe is all the matter and energy that The Universe is all the matter and energy that exists everywhere. The universe includes:exists everywhere. The universe includes:

All stars and constellations, galaxiesAll stars and constellations, galaxies Meteorites and meteorsMeteorites and meteors Planets, moons and satellitesPlanets, moons and satellites Supernovas, pulsars and quasarsSupernovas, pulsars and quasars AsteroidsAsteroids PlasmaPlasma

Star ConstellationsStar Constellations

We see stars in the skyWe see stars in the sky A constellation is a group of stars that forms a A constellation is a group of stars that forms a

shape or patternshape or pattern Constellations are used for calendars, keeping Constellations are used for calendars, keeping

time, finding one’s direction on land and at sea.time, finding one’s direction on land and at sea. These stars appear to move from East to West These stars appear to move from East to West

across the celestial sphere.across the celestial sphere. The stars appear to move across the sky in one The stars appear to move across the sky in one

night, but this is just an illusion due to night, but this is just an illusion due to Earth’s Earth’s ROTATION.ROTATION.

RotationRotationRotationRotation

The apparent daily motion of celestial objects is The apparent daily motion of celestial objects is due to Earth’s due to Earth’s rotationrotation..

RotationRotation is the turning of an object on its axis. is the turning of an object on its axis.

Celestial objects are not actually moving from east Celestial objects are not actually moving from east to west across the sky, rather the earth is to west across the sky, rather the earth is rotatingrotating under them.under them.

Rotations

RevolutionRevolutionRevolutionRevolution

RevolutionRevolution is the movement of one celestial is the movement of one celestial object around another.object around another.

The path along which an object travels during The path along which an object travels during a revolution is called an a revolution is called an orbitorbit. .

Earth’s RevolutionEarth’s RevolutionEarth’s RevolutionEarth’s Revolution

Stars and PlanetsStars and Planets

The solar system is made up of the Sun, and The solar system is made up of the Sun, and all the objects that travel around it. all the objects that travel around it.

The planets are NONLUMINOUS - we see The planets are NONLUMINOUS - we see them because light reflects off them (they them because light reflects off them (they don’t glow).don’t glow).

The sun and stars glow - they are called The sun and stars glow - they are called LUMINOUSLUMINOUS

Observing Stars and PlanetsObserving Stars and Planets

We can see Mercury, Venus, Mars, Jupiter, We can see Mercury, Venus, Mars, Jupiter, and Saturn without binoculars and Saturn without binoculars

The brightest star we can see is SiriusThe brightest star we can see is Sirius

The Difference between Planets and StarsThe Difference between Planets and Stars

Planets Planets - - o Are near – in our solar systemAre near – in our solar systemo Are smaller than most starsAre smaller than most starso Reflect light from the sunReflect light from the suno Are usually cool or coldAre usually cool or coldo Are usually made of rocks or gasesAre usually made of rocks or gaseso Have a steady lightHave a steady lighto Wander slowly through Wander slowly through

constellationsconstellations

The Difference between Planets and Stars (continued)The Difference between Planets and Stars (continued)

StarsStars o Are very far away, past our solar Are very far away, past our solar

systemsystemo Are usually larger than planetsAre usually larger than planetso Give off their OWN lightGive off their OWN lighto Are very hotAre very hoto Are made of high temperature gasesAre made of high temperature gaseso Appear to twinkleAppear to twinkleo Move as part of a constellationMove as part of a constellation