Answer:
1. The big bang theory.
2. The Sun formed in the center, and the planets formed in a thin disk orbiting around it.
3. The inner planets (mercury, venus, earth, mars) are closer to the Sun and are smaller and rockier. The outer planets (jupiter, saturn, uranus, neptune) are further away, larger and made up mostly of gas.
4. All planets move about the Sun in elliptical orbits, having the Sun as one of the foci. A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time.
5. When meteoroids enter Earth's atmosphere (or that of another planet, like Mars) at high speed and burn up, the fireballs or “shooting stars” are called meteors. When a meteoroid survives a trip through the atmosphere and hits the ground, it's called a meteorite.
Explanation:
Hope it helps.
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