nebular theory
Excluding religious speculation - the accepted explanation is the 'big bang' theory. Since we discovered that the Universe is still expanding - we theorise that all the matter was in a single 'lump' - which fragmented and was flung out into space by the big bang explosion.
Accretion disk.
The Nebular Hypothesis.
heliocentric theory
Interstellar dust
That would be difficult to explain. -- The Sun IS a star. -- It IS in my solar system. -- It's the ONLY star in my solar system. -- So the sun is THE star in my solar system.
they believe our solar system was formed by the big bang
The catastrophic theory of solar system evolution is the idea that two stars collide. The remaining material that is expelled then begins to form planets.
Astronomer.
From spinning matter
Not exactly, it is a theory about the origin of the Universe; which does include the Solar system...
The laws of physics and the evidence of the extant solar system as observed today.
a theory or story of the origin and development of the universe, the solar system, or the earth-moon system.
One theory is the Big Bang - after that, matter, including Earth, formed inside a solar nebula which later became our Sun.
Interstellar dust
Depends on your denotation for the world. If your intended use of the word "world" is the Earth, then the Nebular Hypothesis for the formation of solar systems is more appropriate to explain the origin of planets, like Earth.
That would be difficult to explain. -- The Sun IS a star. -- It IS in my solar system. -- It's the ONLY star in my solar system. -- So the sun is THE star in my solar system.
they believe our solar system was formed by the big bang
Isolate planets of the solar system and explain their unique characteristics.
the nebular theory
explain earth's position in the solar system and describe its closest neighbors.