the moon
It is believed that Theia collided with Earth around 4.5 billion years ago, leading to the formation of the Moon. The debris ejected from this collision eventually coalesced to form the Moon, while some material merged with Earth. This event played a crucial role in shaping the early Earth and its satellite, the Moon.
We believe that the proto-Earth, very early in the formation of our solar system, probably collided with another planet, one that might have been as large as Mars. The collision probably entirely re-formed the resultant Earth, and that the heavy metallic cores of both planets merged. Debris blasted into space by the collision probably coalesced to form the Moon.
The three types of materials found in the planetary rings that collided with the Earth are silicate rock, ice, and organic compounds. These materials were present in the form of dust, debris, and small particles that accumulated in the ring system around the protoplanet. The collision of these materials with the Earth contributed to the formation and composition of our planet.
There is a theory that Theia (Thea) was an additional planet that formed in a similar orbit to earth, and that Earth and Theia collided approximately 4.533 billion years ago (4,533,000,000 years ago). The belief is that the resulting collision caused debris from earth to be blasted into orbit causing the formation of the moon.A good summary is found here:http://www.dailygalaxy.com/my_weblog/2007/07/the-theia-hypot.html
Ashfall is the common name given to the ash rocks and other debris that is ejected from a volcano during an eruption.
the moon
The moon formed when a celestial body collided with Earth, causing debris to be ejected into space. This debris eventually came together to form the moon.
The giant impact theory proposes that the Moon was formed from debris created when a Mars-sized body collided with Earth early in its history. This collision would have ejected material into space that eventually coalesced to form the Moon. This theory is supported by evidence from lunar samples and computer simulations.
It is believed that Theia collided with Earth around 4.5 billion years ago, leading to the formation of the Moon. The debris ejected from this collision eventually coalesced to form the Moon, while some material merged with Earth. This event played a crucial role in shaping the early Earth and its satellite, the Moon.
Scientifically, the moon was formed around 4.5 billion years ago when a Mars-sized object collided with Earth. This collision ejected debris that eventually coalesced to form the moon. So, in a sense, the moon has not always been there, but it formed relatively early in the history of the solar system.
The best theory there is, is that a giant object collided with the Earth early in its history. This threw large amounts of debris into space, which then began orbiting the planet and eventually coalescing through the force of gravity, to form the Moon.
"Ejected debris" the the solid material shot into the air by an erupting volcano (as opposed to the gasses ejected by the same eruption).
The idea that the moon formed from debris created by a giant impact between Earth and a Mars-sized object is called the Giant Impact Hypothesis. This theory suggests that material ejected from this collision eventually coalesced to form the moon.
The moon was created when a large planetary object collided with the young Earth. Earth's gravity kept some of the matter around it's orbit and the moon eventually became a spher, due to it's own gravity.
The most widely accepted theory is that the Moon was formed from debris ejected into space when a Mars-sized object collided with Earth early in its history. This debris eventually coalesced to form the Moon.
The giant impact theory that the moon formed when Earth collided with another object named Theia that was roughly the size of Mars. The debris ejected into space later came together to form the moon.
Shrapnel