From my own knowledge, planets existed since Earth was created in the Big Bang, so, from what I can see, it means that the planets existed in their basest form about 13.7 billion years ago. However, Earth has, theoretically, only been earth for about 4.54 Billion years, so somewhere nearer to 13.7 bya rather than 4.54 bya.
I'd say 13.7 billion years ago.
Earth was created after the big bang
-- planets formed almost instantly
no sciences have found the exact time
All planets are formed form the remains of the solar nebular.
The dust that remained after the sun formed coalesced to form planets, asteroids, and comets.
The planets orbit the Sun. The Sun is at the center of our solar system and does not move.
Planets orbit around the sun due to gravitational attraction. The sun's gravitational pull keeps the planets in their orbits, while the planets also exert a gravitational force on the sun, causing it to wobble slightly. The sun provides the heat and light necessary for the planets to sustain life.
Within the Sun, nuclear fusion between hydrogen and helium takes place, giving off enormous amounts of energy. This energy is released in the form of radiation, which travels through the vacuum of space and reaches planets.
No
A solar system!
Energy from our Sun travels to the planets through space in the form of electromagnetic radiation, the carrier of which energy is the photon.
Roughly 4.6 billion years ago.
The planets that make part of the solar system move around the Sun. The huge gravity power of the Sun maintain all planets and moons orbiting around it on an elliptical form.
Most rings are made of ice. Therefore the planets that are father away from the sun are colder than the ones near the sun. Ice will form rings around the planets.
In order for a planet to form, it must have a centre of mass to orbit around. In the example of our solar system, the planets were formed AFTER the sun.
All planets are formed form the remains of the solar nebular.
Radiation... lots of it. Mainly in the form of heat and light.
The planets are satellites of the sun. The moons are satellites of the planets. The moons revolve around the planets captured by their gravity, while the planets revolve around the sun captured by its gravity and the sun.
There are eight planets orbiting the sun. In order, form nearest the sun to farthest they are: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune
The dust that remained after the sun formed coalesced to form planets, asteroids, and comets.