radiactive zone
They are called planetesimals. These small bodies collided and merged to form larger bodies like planets and moons during the early stages of the solar system's formation.
The protoplanet hypothesis describes the formation of planets from the dust and gas present in the early solar system. It suggests that small planetesimals collided and merged to form larger celestial bodies, eventually leading to the creation of the planets we see today.
The possessive form of the noun "planets" is "planets'."
It is highly unlikely for planets to form on another planet. Planets typically form from material surrounding a star, not from existing planets. However, moons can form around planets through processes such as accretion or capture.
The planets of our solar system were formed at different times, the earth is known to have formed as a planet about 4.6 billion years ago but other planets in the solar system may have formed earlier or later as they were quite conceivably not formed in the same manner as the earth
Planetesimals.
accretion
It's called accretion.
It's called accretion.
They have collided them and created craters.
Earth and Mars have never collided. They are two separate planets in our solar system that orbit the Sun.
Lies
Collider and collision are the noun forms for the verb to collide; collided is the past tense of the verb.
Most moons of planets are believed to form with their planets as the developing planet is surrounded by a disk of debris. Some moons, though, many be captured asteroids or planetoids. Earth's moon is believed to have formed when Earth collided with another planet.
They are called planetesimals. These small bodies collided and merged to form larger bodies like planets and moons during the early stages of the solar system's formation.
No planet has ever elided. Question may mean "collided", I guess.
Bigger galaxies. And stars.