As far as we know - there is "no outside of the universe", so nothing.
moon
No one knows that because we have not explored outside the universe. If you are thinking about the galaxy, it looks like a straight line from Earth and a circular object from outside the galaxy.
The mass of an object is unaffected by gravitational forces. Assuming we ignore relativistic effects (mass increase to infinite and so on) we can say that an object with a mass of 5kg will have that mass anywhere in the universe (within reason). On the other hand, an object that WEIGHS 5kg on earth will have a measured weight that varies considerably depending upon what gravitational fields are affecting it.
In a geocentric universe the earth is the center of the universe or solar system and everything revolves around it. In a heliocentric universe the sun or a star is the center of the universe or solar system. We live in a heliocentric solar system with the sun as the center.
No, the mass of an object remains the same regardless of where it is located in the universe. However, an object's weight, which is the force exerted on it due to gravity, will be less on the moon compared to Earth because the moon has less gravitational pull.
moon
That would be Earth's Moon, 'Luna'.
No one knows that because we have not explored outside the universe. If you are thinking about the galaxy, it looks like a straight line from Earth and a circular object from outside the galaxy.
From Earth, a celestial object is any object outside or above Earth's atmosphere.
Everything in the universe, which has mass, is the source of gravity. Mass is the fundamental property of every object in this universe and it is due to this property that every object attracts other objects. So, earth is also a source of gravity.
They all do. Every object in the universe has gravity.
If the object is outside the earth's atmosphere, there is no force pushing up on it. If it is inside the earth's atmosphere, then air drag is pushing up on it.
Yes. In fact, every object in the universe exerts a gravitational pull on every other object in the universe, but most of them are too small to notice.
because we are on earth the mass of an object greater and if we will in the outside of earth we will lessen
yes, but most gravitational pulls are only noticeable if the object is enormous, for example, Earth.
One who studies astronomy - which is basically the study of the Universe, of things which are mainly outside of planet Earth.
The force being tested is gravity, which is pulling the object downward toward the center of the Earth. This force is responsible for the weight of the object and is a fundamental force in the universe.