The planets formed in the solar system about 5 billion years ago, they weren't "added to it" later.
The discovery of the planets is lost in the mists of prehistory, except for Uranus (1781) and Neptune (1846).
Hydrogen and helium.
What is a solar System Watch? Solar System Watch is a great way to quickly learn about our solar system and be fun. From the Moon to Mars, you can learn about each planet, its moons, and other celestial bodies in our Solar System.
because each planet is millions of miles apart
grgravitational interraction between each planet and the sun
In the solar system, the planets that are on each side of the earth are Venus and Mars.
yes there is just the core in each planet in our solar system is different hope that helps u cya
You can see the whole solar system and its moons on NASA's Solar System Exploration website (solarsystem.nasa.gov). It provides detailed information on each planet, its moons, and various missions exploring our solar system.
volume. This gives the average density of each planet, which varies depending on the planet's composition and structure.
Galileo Galilei was the first to discover this.
No.
Yes, Billions of people do each day. The Earth is a planet :-)
Every planet in our solar system orbits the same star, which is the Sun. Therefore, each planet has one star. In other solar systems, planets can orbit different stars, but each individual planet still orbits just one star at a time.