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Gravity And Light Questions

How can space expand faster than the speed of light?
If gravity only attracts mass and If light doesnt have mass why does it appear to bend when passing a planet ?
Is the gravitational pull on an object equalised if the object is at the centre of a planet, ie surrounded by the mass of the planet which is creating the gravity?
What is the effect of gravity on a satellite?
What is the speed of light?
Why can nothing travel faster than light?

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Category: astronomy