When an object is flying to the earth and it's increasing it's speed through gravity, does a remote observer see this increase of speed too, or will he see the object moving at a constant speed?(adsbygoogle = window.adsbygoogle || []).push({});

And another question:

Is there any time dilation by the remains of an object that hits a planet (that is not spinning), compared to an object that's flying in the same orbit as the planet. The first object has lost it's momentum and is now moving with the same speed as the second object. Is the time dilation on both objects the same?

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# Relative observed speed?

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