The Sun is a vulgar star, neither large nor small, neither hot nor cold, neither young nor old.
It is estimated that his age is 5,000 million years and that many others will continue to shine with the same intensity.
When the sun reaches the age of 11,000 million years, it will have depleted all the hydrogen it is using as fuel, and will begin to consume helium in its nuclear reactions.
Then the sun will go from being a normal star to becoming a red giant. Its volume will grow to the vicinity of the current planet Mercury. All planets to Mars will be attracted and encompassed in the mass of the Sun.
New transformations will turn the Sun into a pulsating star, and then a white dwarf, in which all its mass will be concentrated in a size similar to that of our Earth. The farthest planets will contract or become extinct, altering all the mechanics of our solar system and possibly influencing that of nearby stars.
But in the meantime, there it is, and it is the center of our house. The Solar System, immense according to our scale, is, however, a very small part of the Universe. How did it form? What is it made of? How does it work?
This chapter contains several articles about our Solar System.
In this chapter:Origin of the Solar System: Since Newton's time it has been possible to speculate about the origin of the Earth and the Solar System as… Read page Origin of the Solar System (II): In recent years, some astronomers have proposed that the initiating force in the formation de… Read page Origin of the Solar System (III): From 1900 the nebular hypothesis lost so much strength to explain the formation of the System… Read page Sunspots: If the temperature of the solar surface is so high that it is at target, why what sunspots are black ... Read pagePlanets of the Solar System: Essentially, a planet differs from a star in its amount of mass, much smaller ... Read pageThe orbits of the planets: Why do all the planets occupy, more or less, the same orbital plane? The best astronomical conjecture… Read page Can we travel to the planet Mars ?: NASA has a mystery to solve: Can we send people to Mars, or not? It's a question… Read page Earth-rovering asteroids and Apollo objects: If the asteroids penetrate beyond the orbit of Jupiter, wouldn't there be others… Read pageSedna, the tenth planet in the Solar System ?: NASA-sponsored researchers have discovered the most distant object in ... Read pageKites in the sky: The ancients, observing that the comets appeared and disappeared in an unpredictable way, surrounded by a pale ... Read pageComments: The Oort cloud: The Oort cloud is a great concentration of submitted comets to the forces of the Sun and other stars… Read page