The Solar SystemThe Solar System

What is the Solar System?What is the Solar System?

• The Solar System is made up of the sun, the planets, their moons, asteroids, and comets.

Order of PlanetsOrder of Planets

Order of PlanetsOrder of Planets

Solar System VocabularySolar System Vocabulary

• Solar System: The sun together with the eight planets and all other celestial bodies that orbit the sun.

• Outer Planets: Any of the four planets, Jupiter, Saturn, Uranus, Neptune, with orbits outside that of Mars.

• Inner Planets: Any of the four planets, Mercury, Venus, Earth, and Mars, whose orbits are closest to the sun.

• Telescope: An arrangement of lenses or mirrors or both that allows the observation of distant objects

• Axis A straight line about which a body or geometric object rotates or may be conceived to rotate.

• Planet A celestial body larger than an asteroid or comet, illuminated by light from a star, such as the sun, around which it revolves

Solar System VocabularySolar System Vocabulary• Orbit: The path of a celestial body or an artificial satellite as it

revolves around another body. • Rotation: The act or process of turning around a center or an

axis: the axial rotation of the earth. • Star: A self-luminous celestial body consisting of a mass of

gas held together by its own gravity.• Constellation A formation of stars perceived as a figure or

design.

Planet ScalePlanet Scale

• http://science.nationalgeographic.com/science/space/solar-system

How big is outerspace?How big is outerspace?

• YouTube - Bill Nye The Science Guy on Outerspace (Full Clip)

The SunThe Sun

• The sun is a star.• It is at the center of our

Solar System.• The eight planets orbit

around the sun.• It is made up of swirling

gases and nuclear reactions.

• The sun provides the Earth with heat and light.

• The sun is very, very hot.

Stars in the night sky Stars in the night sky

• Constellations

• http://youtu.be/I7m61DnPqvE

How is the Solar System made How is the Solar System made Up?Up?

• The Solar System is made up of:– the inner planets

• Mercury, Venus, Earth, & Mars

– The asteroid belt• Thousands of asteroids are in this belt. Asteroids

are rocks that orbit around the sun.

– The outer planets• Jupiter, Saturn, Uranus, Neptune

– Comets are also part of the Solar System.

The Solar System is made up of:The Solar System is made up of: the inner planets the inner planets

Mercury, Venus, Earth, & MarsMercury, Venus, Earth, & Mars• There are four inner planets

• They are small

• They are solid

• They have no more than two moons

• The closer the planets are to the sun the faster they revolve

Outer PlanetsOuter PlanetsJupiter, Saturn, Uranus, NeptuneJupiter, Saturn, Uranus, Neptune

• No surface, because they are made of gasses

• There are four outer planets

• The biggest outer planet is Jupiter

• All of the outer planets have rings

What is a What is a planetplanet??

A planet is a body which revolves around a sun. It has no light of its own, but reflects the light of the sun. It is in orbit around the sun. Our Solar System contains 8 planets.

Mercury Venus Earth Mars Jupiter

Saturn Uranus Neptune

Bill Nye GravityBill Nye Gravity

• http://youtu.be/6f6maa9xPDM

How far are the planets of our solar How far are the planets of our solar system apart?system apart?

• http://youtu.be/97Ob0xR0Ut8

TechnologyTechnology

• How can we see the planets and the stars?

• Space Ships

• Telescopes

• Satellites

Which one is the smallest?Which one is the smallest?Which one is the largest?Which one is the largest?

• Can you put these in size order?

• Place the following in order from largest to smallest.

• Moon• Sun• Earth

Answer: Sun, Earth, then Answer: Sun, Earth, then moonmoon

• The sun is the largest• Next in size is the Earth.• The moon is smaller than the

Earth.

The Earth:The Earth:

• -is the third planet from the Sun,• -rotates on its imaginary axis

counterclockwise every • 24 hours or 1 day,• -appears blue in space because it is 70% water, -revolves around the sun every 365 days or 1 year.

The seasons and the tilt of the The seasons and the tilt of the EarthEarth

• http://youtu.be/DuiQvPLWziQ

Moon PhasesMoon Phases

Which of these is the next Which of these is the next phase of the moon?phase of the moon?

• New Moon --- Waxing Crescent --- ?

• F Full Moon

• G Waning Crescent

• H First Quarter

• J Waxing Gibbous

The next major phase of the The next major phase of the moon would be…moon would be…

• First quarter.

• The moon revolves around -

– F itself– G the Earth– H the sun– J the solar system

The MoonThe Moon

• The moon is a satellite that revolves around the Earth

• The moon revolves or orbits the Earth once every 29 days.

• We all ways see the same side of the moon because the moon rotates and revolves at about the same speed.

Moon Phases Bill NyeMoon Phases Bill Nye

• http://youtu.be/Gl89fdJ7JUM

Rotation causes day & night.Rotation causes day & night.

• Rotation is the turning or spinning of the Earth in one place on its imaginary axis.

• Rotation of the earth on its axis causes day & night. (answer A).

Which of these is caused by the Which of these is caused by the turning of the Earth?turning of the Earth?

– F Summer and winter– G Stars– H Day and night– J Moon phases

The revolution of the Earth The revolution of the Earth around the Sun takes-around the Sun takes-

– A a day & night or 12 hours– B a week or 7 days– C a month or 29-31 days– D a year or 365 days

The revolution of the Earth The revolution of the Earth around the sun around the sun

• Takes 365 days • or one year.• The Earth is a

satellite of the Sun• NOTE:• Due to the tilt of the

Earth’s axis during revolution, the Earth experiences seasons.