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Among the thousands of stars that form our galaxy there is a medium-sized one, located in one of the spiral arms of the Milky Way, which has a special interest for us ...
Of course, because we are very close to that star and, in a way, we live from it. It is, of course, our Sun. Around it has a planetary system which includes our planet, the Earth.
Our star, the Sun, together with the planets and other bodies that revolve around it, constitute what we call The solar system. It was formed about 4.6 billion years ago and, far from being stable, it is a dynamic system that is constantly changing and evolving.
The planets, asteroids and comets describe elliptical orbits around the Sun almost in the same plane where the Earth rotates, called ecliptic, and in the same sense counterclockwise, if they were observed from the solar north pole. There are few exceptions and they are usually objects far from the sun.
The astronomy courses were initially only for priests and wise. Fortunately, education on this topic has become popular, although the "public" is still unaware of many aspects of our closest space environment. Let's see if we fix it in the following chapters.
Solar system. Astronomy education
- What is the solar system?
- How is our solar system?
- How did the solar system form?
- The sun is our star
- Structure and composition of the Sun
- Solar activity
- The planets
- Rocky planets
- The planet Mercury
- The planet Venus
- Earth is our planet
- Earth structure
- Earth movements and stations
- The Meteorites
- The moon is our satellite
- Phases of the Moon and eclipses
- The 2 satellites of Mars
- Mars: Mount Olympus
- The Asteroid Belt
- Gaseous giant planets
- Planet Jupiter, an old gas giant
- Jupiter's satellites
- Saturn, the planet of the rings
- Saturn's moons
- The planet Uranus
- The moons of Uranus
- The planet Neptune: blue, distant and windy
- The moons of Neptune
- Shepherd rings and satellites
- Pluto and beyond
- Pluto is a dwarf planet
- The Kuiper Belt
- Candidates for planets (transneptunians)
- Comets, what they are and where they come from
- Famous Kites
- The Oort Cloud
- Space exploration
- Advanced Solar System
- Why does the sun shine?
- Solar cycles
- Solar storms
- How does the sun affect the weather?
- Solar System Structure
- Why do planets orbit?
- The border of the Solar System
- When will the solar system die?
- The moon and the tides: a sea that rises and falls
- Asteroid against Earth
- Monographic: Earth in the Universe
- The Solar System and our Galaxy
- A shared extraterrestrial past
- What is special about our Planet?
- Earth's atmosphere
- The windows to the Universe
- Shape and dimensions of the planet
- Are there other lands in the Universe?
- The Kepler telescope
- Are we alone in the universe?
- NASA and Riotinto in Huelva