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I have a few questions. 1: In theory could we build a telescope so large it could see what aliens were doing on another planet?
2: Take the hypothetical traveling twin as example from the special theory of relativity. If someone was traveling near speed of light in a ship for 2 years and had 2 years of video, while 30 years passed on Earth. How long would the video be when they got back to earth?
2a: If there is 30 year of video and person ages 2 years, is person moving in slow motion?
3: If a ship was traveling near speed of light and had a live laser video feed hooked up to a feed on earth the whole time, what would the screen show; How would each observer see the others "time" passing?
3a. Would observing time passing on earth disrupt the relativity of time for the person on the spaceship?
3b: How much food would need to be on the ship, 2 years or 30 years worth?
Two years worth. Please keep in mind that time really is slowed down for observers in the ship as reckoned by observers on Earth. Also keep in mind that time really is slowed down for observers on Earth as reckoned by observers on the ship.