Iam trying to find out how can a astronaut can move away from the moon.

Maybe I should ask you  about how you feel weight. Well  let me say that what you are feeling right now isn’t really gravity. For example stand on an elevator. Do not push the buttons. Just stand there while the elevator is at rest. How do you feel? Because you are at rest and staying at rest, your'e in equilibrium.

And if your acceleration is zero, then your net force must also be zero. 

Two forces you feel are the force of the floor pushing up and gravitational interaction with the Earth pulling downward. The magnitudes of those forces must be equal in order for the net force to be zero.If you push the up button during the "ride" the elevator accelerates upwards, which might make you feel Anxious or maybe even heavier. 

If you're accelerating upwards, then the net force must also be upwards. Using the same two forces, there are two ways this can happen. The floor can push MORE on you, or the Earth can pull LESS. Since the gravitational force depends on your mass, the Earth’s mass and the distance between the two,doesn’t change. So, the floor must push harder on you.And you feel heavier but the gravitational force is the same. If You are going to the top floor and then elevator has to stop. Since it was moving up, but slowing down it must accelerate in the downward direction.Now the net force must be in the downward direction. Again, the gravitational force's magnitude doesn’t change. The only thing that can happen is for the floor to push less. which makes you feel lighter.Suppose the elevator cable breaks and the elevator falls. In this case, it's acceleration will be -9.8 m/s2. How much would the floor have to push up on the person to accelerate down at -9.8 m/s2? It wouldn’t have to push at all. The force the floor exerts on you would be zero. How would you feel? You would feel scared – I mean you are in an elevator with the cable cut. How else do you think you would feel? Well, maybe you could be scared AND hungry if you were late for lunch or something. Oh, you would feel weightless. 

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explanation:

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.