1. What are the Outer planets?
The four planets farthest from the sun are known as the outer planets. Jupiter, Saturn, Uranus, and Neptune

2. Jupiter

3. Jupiter Jupiter, the fifth planet from the Sun, is a gas giant.
A gas giant is a very large planet made mostly of gases.
Jupiter is the largest planet in our solar system. In fact, if it were hollow, it is so big that all of the other planets could fit inside it!

4. Jupiter’s Moons Jupiter has many moons.
Galileo was the first person to see the four largest moons through his telescope in 1610.
They are about the size of Earth's moon.
One Example is Europa – This is the smoothest object in the solar system.

5. Jupiter’s atmosphere has a weather system
called the Great Red Spot that has been
raging for centuries.
It is a disturbance more than three times
the size of Earth.

6. Saturn

7. Saturn The sixth planet from the Sun, Saturn is also a gas giant.
Like Jupiter, Saturn’s atmosphere is mostly hydrogen and helium.
  The Voyager space probe explored Saturn’s rings. It showed that the particles that make up the rings range in size from tiny grains to boulders.

8. Saturn’s Moons

9. Using the chart, What is one reason people cannot live
on Jupiter and Saturn?
They are both too cold to live on!

10. Using the chart, What planet has more moons?
Jupiter with at least 63!

11. hmmm I wonder why it says “at least” for the number of moons??

12. Uranus

13. Uranus
In 1781, William Herschel discovered a seventh planet orbiting the Sun.
The gas giant Uranus is the farthest planet you can see without a telescope.
Uranus is so cold that the methane is a liquid.  
Tiny drops of liquid methane form a thin cloud that covers the planet.
This gives Uranus its fuzzy blue-green look.

14. Uranus rotates on its side
Uranus rotates on its side. No one knows for sure why Uranus has this odd tilt. Scientists think that a very large object may have collided with the planet when the solar system was still forming. This bump may have knocked Uranus onto its side.

15. Neptune

16. Neptune
Neptune is the eighth planet from the Sun. It is the smallest of the gas giants.
Even so, if Neptune were hollow, it could hold about 60 Earths.
It is so far away that it can't be seen without a telescope.
In 1846 astronomers discovered Neptune.
A few days later they spotted Triton, Neptune's largest moon.

17. Which planet has a larger diameter?
Uranus

18. How much longer is the Earth day on Uranus?
One hour

19. The Four Outer Planets
Jupiter
Saturn
Neptune
Uranus

20. Galileo Galilei
Galileo lived from 1564 to He was a mathematician and astronomer. He agreed with Copernicus that all planets revolve around the Sun. Galileo used a telescope to observe the Sun, Moon, planets, and stars.

21. Galileo
When I saw Saturn through my telescope, I was surprised. I saw what looked like a planet with handles! The “handles” were actually the brilliant ring system that orbits the planet.

22. What’s The Matter With Pluto!?!

23. What’s The Matter With Pluto!?!
Until 2006, Pluto was considered a ninth planet. But Pluto is different from the eight planets in several ways. Now scientists refer to Pluto as a dwarf planet. A dwarf planet is a small, ball-shaped object that revolves around the Sun.

24. Let’s see how you do locating the planet!
Quiz Time!
Let’s see how you do locating the planet!

25. The farthest planet you can see without a telescope.
Find the planet
The farthest planet you can see without a telescope.
Jupiter
Uranus
Neptune

26. Oh no! Quick guess again!

27. Great Job Kids!

28. The largest planet in our solar system.
Find the planet
The largest planet in our solar system.
Jupiter
Saturn
Neptune

29. Oh no! Quick guess again!

30. Great Job Kids!

31. The smallest planet of all the gas giants.
Find the planet
The smallest planet of all the gas giants.
Jupiter
Saturn
Neptune

32. Oh no! Quick guess again!

33. Great Job Kids!

34. This Planet has a weather system called the “Great Red Spot”.
Find the planet
This Planet has a weather system called the “Great Red Spot”.
Jupiter
Saturn
Neptune

35. Oh no! Quick guess again!

36. Great Job Kids!

37. This Planet rotates on its side.
Find the planet
This Planet rotates on its side.
Jupiter
Saturn
Uranus

38. Oh no! Quick guess again!

39. Great Job Kids! You passed!