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All of the bodies were recovered, but it was never determined how the astronauts died. It is assumed they died due to the impact with the ocean, and not the explosion itself.
Iron meteorites come from the cores of differentiated bodies after bolide impact.
The moon orbit creates the tides of the ocean, without it earth would flood. Many fish use the Gravitational pull of the moon to direct them when migrating.
because the planet has a way to reform it self every millions of years.
The moon will probably never be destroyed by the Earth's gravitational attraction because it is in a stable orbit. Its orbit is kept stable by its high velocity, therefore the only way Earth's gravitational attraction could pull the moon out of its orbit and towards the Earth is if its course is changed or it is slowed down tremendously, perhaps by a large impact such as a meteor.
Sort of...any body of mass exerts its own gravitational pull (the Suns gravitational pull keeps Earth in its orbit, while the Earth's gravitational pull keeps the Moon in its orbit - and us on the surface). Even Humans, dogs, turtles and snails exert some gravitational influence on their surroundings - but in such a low strength as to not have any noticable impact on the immediate surroundings.
In old texts it was believed that the asteroid belt was the remains of a planet that got torn apart by either a massive impact or the gravitational attraction of Jupiter and the Sun. Nowadays it is firmly agreed that the asteroid belt is a primitive remainder of the early accretion disc and a planet didn't form because of the gravitational attraction of Jupiter and the Sun.
The Earth's moon is like Mercury because it has a very thin atmosphere, which isn't enough to stop the impact of meteors. Both of these celestial bodies are also very similar in size.
The force of gravity varies with the distance - at a greater distance, the force is less. Thus, The side of the Earth that is closer to the Moon feels more gravitational attraction than the side that is farther away - Earth is pulled apart, slightly.
Because it is the nearest celestial body to our planet Earth. It has great impact on us.
Objects
It is a force, such as gravity or magnetic attraction, which act at a distance.
An object, in itself, does not have any force. It can exert a force on another object, such as gravitational or electro-magnetic attraction or repulsion, or from impact. However, in all such cases, you require two (or more) objects: one object, in isolation, exerts no force.
Newton's law of gravitation. It states that gravitational force is directly proportional to product of the masses and inversly proportional to square root of distance between them. Gravitational force has the greatest large-scale impact on the universe. It act upon all energy,matter etc. This force between two bodies is an action and reaction pair. This force is very small in the case of massive bodies and it is appreciable in the case of massive bodies. Gravitational force between the Sun and Earth is of the order of 10 to the power 27 N.
no
Without gravity the Earth would go off into outer space where it's cold and dark and the temperature on Earth would probably fall to about -250 degrees C. The Sun's gravity keeps us in a nice nearly-circular orbit so that we can have a good time.