Yes, that is how Earth's formed, it hit a large protoplanet called Theia.
Rings around a planet are caused by a collision. This collision could occur from a moon crashing into a moon, a moon crashing into the planet, an asteroid crashing into a moon or an asteroid crashing into the planet. The resulting debris from the collision gets trapped in the planetary orbit, and hence, creates a ring system.
A planet is too large to sit on a moon.
It is believed that the moon was created by a collision between proto-Earth and a Mars-sized planet. The moon was formed from accreted Earth collision material.
The fictional planet Tralfamadore is the moon of a large planet called Tran.
None in our solar system. The Earth's Moon is the largest moon with respect to its planet.
In size and mass it is enormous compared to it's parent planet - The Earth.
No. The "Sea of Serenty," officially called Mare Serenitatis, is a dark region on the moon that marks the site of an ancient and enormous impact event.
the collision ring theory is a theory about how the moon formed. It says that a planet sized objoct hit earth while it was still young and exploded on inpact. Then the debris formed the moon as the magma cooled.
Earth's moon is unusually large in proportion to its planet.
Most researchers are comfortable with the idea that an enormous collision during the formative years of the solar system (roughly 4 billion years ago) "knocked off" a chunk of the very young earth (approximately one-seventh of the total mass of the planet), which subsequently became the moon.
the collision ring theory is a theory about how the moon formed. It says that a planet sized objoct hit earth while it was still young and exploded on inpact. Then the debris formed the moon as the magma cooled.
the collision ring theory is a theory about how the moon formed. It says that a planet sized objoct hit earth while it was still young and exploded on inpact. Then the debris formed the moon as the magma cooled.