universe

1. THE UNIVERSE

2. What do you know about it?
1. Could you explain what the Universe is?
2. How old is it?
3. How was it formed?
4. What is in the Universe?
5. Which units of measurement do we use to
study the Universe?
6. What do scientists think about the Universe’s
future?

3. WHAT IS IN THE UNIVERSE?

4. STARS
• Celestial bodies which
produce light due to nuclear
reactions in their core.
• Our star is called The Sun,
and it is middle-aged.
• It was formed 4.500 million
years ago.
• It is made up of hydrogen.
• It will die as soon as all its
hydrogen run off.

5. PLANETS
Celestial bodies which
orbit a star. Our planet is
called The Earth.
•It is 4.500 million years
old.
•It takes 365 days to orbit
the Sun.
•It is also known as “The
Blue Planet” because the
great amount of water it
contains.

6. SATELLITES
• The satellite which
orbits the Earth is called
The Moon.
• Cellestial small bodies
which orbit a planet.
• They do not produce
light, but they can be
seen because of light
from the stars.

8. WHAT IS THE UNIVERSE LIKE?

10. THE SOLAR SYSTEM
• It is made up of a star (The Sun), and the planets which orbit
it. Besides, we can find moons, asteroids and comets.

11. Orbit Speeds

12. Relative Size

13. ASTEROIDS
• Rocky bodies smaller
than planets and with
no spherical shape.
• In our system they are
located between Mars
and Jupiter.
• Sometimes they get out
of their orbit, travelling
through the space, and
colliding planets or
moons.

14. COMETS
• Cosmic snow balls of frozen gases, rocks and dust.
• When they orbit closer to the Sun, they heat up and
spews dust ang gases into a giant glowing head.

15. GALAXIES
• They are groups of systems
(stars and planets orbiting
them).
• Our galaxy is called Milky
Way.
• It is a spiral-shaped galaxy.
• The Solar Sistem is found in
the Orion Arm.
• There are about 300.000
millions stars in the Milky
Way.

16. THE SOLAR SYSTEM
PLANETS

18. INNER PLANETS
• They are made up of rocky material.
• They are nearer the Sun than outer planets.
• They are Mercury, Venus, Earth and Mars.
• They are smaller than outer planets.

19. OUTER PLANETS
• They are made of gas.
• They are farther away
from the Sun.
• They are bigger than
inner planets.
• They are Jupiter,
Saturn, Uranus and
Neptune.

20. HOW DO PLANETS
MOVE?

21. Rotation – Revolution

22. CONSTELLATIONS
• A constellation is a
group of stars that,
when seen from
Earth, form a
pattern.
• Actually, they are
really far apart in
space.
• The stars in the sky
are divided into 88
constellations.