earth universe unit 01 eso bilingual

1. THE EARTH IN THE UNIVERSE

2. The universe is formed by all celestial
bodies in the space: asteroids,
comets,stars, planets, satellites…

3. The universe began
with a massive
expansion, billions
and billions of years
ago, and it continues
to expand with
every passing
second.

4. Galaxies
A galaxy is a huge system of stars, dust,
and gas. Gravity holds it together. Our
solar system is part of a galaxy called
the Milky Way. There are billions of
galaxies in the universe. Only a few can
be seen without a telescope. They are
so far away that they look like single
points of light.

5. THE MILKY WAY

6. Stars are made of hot, glowing gases.
The Sun is a star. It is made of hot,
glowing gases. The Sun is the closest
star to Earth.
This is why it looks bigger and brighter
than other stars.
The Sun is so big and bright that you
cannot see other stars during the day.

8. The solar system
is everything that
moves, or orbits,
around the Sun.
This includes the
eight planets and
their moons.
Earth is one of
the eight planets.

10. THE SUN
The sun is in the center of the system. The Sun
is important for life on Earth.
The Sun gives heat and light. People, plants,
and animals need heat and light to live.
It is 5,000 millions years old and the
temperature of its surface is very high: 6,500º C

11. A natural satellite of a star.
There are eight planets in our solar
system: Mercury, Venus, Earth, Mars,
Jupiter, Saturn, Uranus and Neptune
All of the planets in our solar system
orbit the Sun.

13. The planets do not give out light.
We can see some of the planets in
the night sky because they reflect
sunlight (like our moon does).
The planets are so far away that
they appear to us like dots of light.
They look to our eyes like stars.

14. A celestial body that orbits a planet;
a moon.
The Moon is the only satellite of the Earth.

16. The Earth is the third planet from
the Sun in our Solar System. It is
the planet we evolved on and the
only planet in our Solar System
that is known to support life.

17. The Earth is about 12,756 km in
diameter. The Earth is the fifth
largest planet in our Solar System

18. The Earth’s surface is a total of 510
million km2.
71 Percent of
the Earth's
surface is
covered with
water.

19. Continents prevail in the
North Hemisphere.
Oceans prevail in the
South Hemisphere.