The document discusses key facts about the solar system and beyond. It details that there are nine planets in our solar system that orbit the sun, including Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto. It also discusses that the Earth orbits the sun every 365 days and is kept in orbit by the force of gravity, and that the moon orbits the Earth every 28 days due to gravity. The document covers topics such as the tilt of the Earth's axis and how it causes seasons, and that our sun is one of millions of stars that orbit the center of the Milky Way galaxy.

1. 09/23/15
The Solar System andThe Solar System and
BeyondBeyond

2. 09/23/15There are nine planets in our solar system:There are nine planets in our solar system:
Mercury
Mars
Jupiter
Saturn
Neptune
Uranus
Pluto
Venus
Earth

3. 09/23/15
The Earth orbits the sun every…The Earth orbits the sun every…
……year (365year (365 11
//44 days)days)

4. 09/23/15
The Earth is kept in orbit by the force of…The Earth is kept in orbit by the force of…
GravityGravity
…and by the
fact that is is
moving at a high
velocity

5. 09/23/15
Gravity also keeps the moon in orbit aroundGravity also keeps the moon in orbit around
the Earth. The moon orbits the Earth every…the Earth. The moon orbits the Earth every…
……month (28 days)month (28 days)

6. 09/23/15
Gravity is ________ if the planet has moreGravity is ________ if the planet has more
mass:mass:
Earth
Jupiter

7. 09/23/15How much of the moon we see depends onHow much of the moon we see depends on
where the moon is in its orbit:where the moon is in its orbit:
Appearance:

8. 09/23/15
Appearance:

9. 09/23/15
Appearance:

10. 09/23/15
The moon is a “natural satellite”. A satellite isThe moon is a “natural satellite”. A satellite is
anything the orbits the earthanything the orbits the earth
Artificial satellites have four main uses:
– Communications
– Monitoring the weather
– Observing the Earth
– Exploring the solar system

11. 09/23/15
The Earth is tilted on an axisThe Earth is tilted on an axis
North pole
South pole

12. 09/23/15
The Earth spins on its axis every ___ (__ hours)

13. 09/23/15
Because of this spin the sun rises in theBecause of this spin the sun rises in the
______ and sets in the ____________ and sets in the ______

14. 09/23/15
The sun appears lower in the _______ than itThe sun appears lower in the _______ than it
does in the ______:does in the ______:
Winter
Summer
Longer shadows
in winter

15. 09/23/15
While the Earth is spinning the side that faces the
sun is in ________

16. 09/23/15
The Earth is divided up into the northernThe Earth is divided up into the northern
hemisphere and the southern hemisphere:hemisphere and the southern hemisphere:
Equator
Northern
hemisphere
Southern
hemisphere

17. 09/23/15
The tilt of the Earth on its axis is alsoThe tilt of the Earth on its axis is also
responsible for the seasons:responsible for the seasons:
What date is it here?
June 21st
What date is it here?
December 21st

18. 09/23/15
Two things happenTwo things happen
because of this tilt:because of this tilt:
1) The days are longer during the summer
2) The weather is warmer during the summer

19. 09/23/15
EclipsesEclipses
1. A solar eclipse:
2. A lunar eclipse:

20. 09/23/15Solar systems, galaxies and the UniverseSolar systems, galaxies and the Universe
OUR SUN is one of
millions of stars that
orbit the centre of…
THE MILKY WAY,
which is one of a billion
galaxies that orbit
AND move away from
the centre of…
THE UNIVERSE
(Basically, everything in the universe orbits around something else)