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Answered 2009-01-22 02:49:14

A whirling cloud of gas or dust that becomes a planet by condensation during formation of a solar system. As the central body, or protostar, of the system contracts and heats up

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What does the protoplanet hypothesis describe the formation of?

the solar system

The protoplanet hypothesis describes the formation of what?

Our solar system

Who proposed the protoplanet hypothesis?

it was Carl von Weizsacker and Gerard Kuiper

What is the difference between a planetesimal and a protoplanet?

the difference is that they dont have alot in common..

What is one of the accepted theories of the formation of the moon?

An early collision by (proto) Earth with a large protoplanet..

How did we get the moon where did it come from?

Currently, the most accepted theory is that it resulted from a crash between a large planetoid (or "protoplanet") and Earth.

Can a planet get a large moon from an enormous collision?

Yes, that is how Earth's formed, it hit a large protoplanet called Theia.

Theory about the origin of the moon?

There are several, but one of the more popular is that a protoplanet about the size of Mars originally shared Earth's orbit. It crashed into Earth, and threw off a gigantic cloud of debris that coalesced into the Moon. If you'd like to read more about this, look up "Theia", the name given to this hypothetical protoplanet.

Why photoplanet hyphothesis for the formation of the solar system?

I think you mean "protoplanet hypothesis". In fact, astronomers usually call it the Nebular Hypothesis A protoplanet is a planet-like object that hasn't fully developed into a planet. Why that hypothesis? It's because it is the best we have to describe the origin of the solar system according to the Laws of Physics.

What is the current theory for the formation of the moon?

It's generally believed that a protoplanet about the same size as the present-day Mars struck Earth early in the solar system's formation.This impact ejected material from Eath that eventually became the moon. This seems so likely that this hypothetical protoplanet has even been given a name, Theia.

How old is Ceres?

Ceres is probably a surviving protoplanet, which formed 4.57 billion years ago in the asteroid belt between Mars and Jupiter

How did the earth get its moon?

The current most widely subscribed-to theory is the Giant Impactor Hypothesis, which supposes that a protoplanet about the size of Mars struck the proto-Earth while the solar system was forming. This "splashed" a lot of magma from Earth, and some of it coalesced in orbit to form the moon. This hypothetical protoplanet has been given the name Theia, who was the mother of the moon goddess Luna in Greek mythology.

What were the sources of heat for the protoplanet?

the sources of heat is the sun and the solar system this makes the earth have heat and energy. The sun is the earth main source of heat and energy

When was the moon first created?

No one was around at the time, so we're not really sure, but the current hypothesis in favor is called the "Giant Impact Hypothesis." It posits that a protoplanet about the same size as the current planet Mars struck the proto-Earth while it was still forming, and "splashed" a lot of rock off. This eventually formed the Moon, while the rest of this protoplanet (named Theia) joined with the Earth.

How would the atmosphere be different if the earth had formed from a much larger protoplanet?

It would be difficult to speculate on how the Earth's atmosphere might be different if the Earth had formed differently. There are many possibilities.

Describe the current theory for the origin of earth's moon?

A protoplanet named Theia, about the size of Mars, hit the Earth while it was still forming and basically "splashed" off the Moon.

Why is Uranus tipped on it side?

Scientists don't know for sure, but they speculate that it may have been hit very early on in the formation o the solar system by an earth sized protoplanet.

What is the protoplanet hypothesis?

The hypothesis states that during the formation of a star, the original nebula disk may be so massive that upon further contraction and flattening, it breaks into separate clouds (vortices) or protoplanets.

Why does protoplanet theory remain theory?

In science, the word "theory" is USUALLY used for well-established theoretical frameworks, that are generally accepted as being true. This is the case with the theory on protoplanets - it is generally held to be true.

What is Uranus special feature?

Uranus is a featureless planet in general. It has a ring system, while it has a very strange axial tilt, probably caused by a collision with an earth sized protoplanet early on in the formation of our solar system.

What is neighboring planets to Jupiter?

Saturn is the outer neighbor to Jupiter. Jupiter's inner neighbor is a little trickier to answer; there are several classifications of planets, and not all of them are commonly honored. The nearest planet, of all classifications of planets (excluding asteroids), to Jupiter is Pallas, a protoplanet. The nearest planet in a step up by size is Ceres, a dwarf planet (both Ceres and Pallas, as well as Vesta, another protoplanet, orbit within the Asteroid Belt). The nearest full-sized planet to Jupiter, in lesser orbital radius, is Mars.

Give an easy definition for protoplanets?

A precursor to a planet. You could also call it an early stage in the formation of planets.

Why are planets all different shapes and sizes?

Planets are mostly the same shape: a sphere, albeit a marginally irregular one. They are different sizes by random chance. The size is determined by how much matter and what type was near the object at the start of its life, as a protoplanet.

What is Vesta?

Vesta - formally known as 4 Vesta. It is an asteroid in the asteroid belt and was thought to be part of a protoplanet. (although the existence of any sort of planet existing, is under debate). It is the second largest object in the asteroid belt, after Ceres the dwarf planet [See related link].

How do scientist believe Earth's moon was created?

A hypothetical protoplanet (Theia) hit the Earth really hard during the Cryptic Era of the Hadean Eon (the Earth was still mostly molten, and completely void of life.) The debris was flung out so far, some of it went out into space and coalesced into the Moon.

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