The universe and the solar system (Celestial bodies (Planets and dwarf …
The universe and the solar system
The solar system
Planets in our solar system
Small in sice, mainly composed of rocks and metal and they are near to the sun
Why is life on earth possible?
gravitational force make posible to retain the atmosphere
Protect us by blocking out dangerous rays of the Sun/ burning meteoroids
oxygen (respiration) an carbon dioxide (photosynthesis)
Distance from the Sun
(most important chemical substance in life)
Perfect amount of heat and light
suitable climate(balance between cold and cold)
Big in sice,mainly composed of gases and ice and they are far away from the sun
Our solar system was created approximately 4600 million years ago from sn inmense cloud of gas and dust.
Is a group of planets and other celestial bodies witch orbit a star.
A historical view of the earth's position
Aristarchus of Samos
(310–230 BC) was the first astronomer to suggest that the Sun was the centre of the Universe.
In the sixteenth century,
(1473–1543) studied and developed the heliocentric model (helio is the Greek word for ‘Sun’).
The geocentric model was developed by
The light-year :stars:
It's equal to the distance that light travels in one year.
Light travels at a speed of 300000 km per second
In 1 year,light travels around 9460000 million km
Big Bang Theory :explode:
It was created as a result of a massive explosion called the Big Bang
The universe was created 13700 million years ago
space and everything that exists in it
The milky way
enormous group of stars,dust and gases held together by the force of gravity.
They change and evolve with the time
They are not isolated ,they form clusters and it forms superclusters
Superclusters(group of clusters)
Clusters(group of a few galaxies)
they are classify by their shape
They are born from a huge cloud called a stellar nebula.The nebula contracts under its own gravity and forms a protostar.
Planets and dwarf planets
They do not emit light
They haven't satellites
They are spherical in most cases
They have their own orbit but the dwarf share one with other celestial bodies.
They have two basic movements
Rotation :night_with_stars:: :sunny:
Time tha the earth needs to rotate 360º on a imaginary axis
Revolution :sunflower: :fallen_leaf: :snowflake: :sunny:
Time that the earth needs to revolve around the star