/u/LegendRaptor080's posts in /r/askscience

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Question about gravitational force in a theoretical situation.

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What would happen if a baseball with the same gravitational force as Earth was in the atmosphere (let’s say the edge of the troposphere) OR on the ground (sea level)?

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What would happen if a jet was flung into the Sun at light-speed?

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So here’s a thought I’ve had for days now: If I send a vessel away from earth, and keep up continuous, unbroken communication while they’re moving away at a constant speed, will I be receiving their messages in real-time?

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If we unlocked FTL travel, and decided to stream a constant, continuous broadcast the POV of the first rocket’s launch before, during, and after launch, would we still see the broadcast in real-time if the rocket accelerates to or faster than the speed of light?

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Since there is a time lag between objects because the speed of light isn’t instant, and all celestial bodies we observe are basically pre-recorded videos of their past selves, what happens if we accelerate to or faster than the speed of light and attempt to observe them?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Question about gravitational force in a theoretical situation.	1
What would happen if a baseball with the same gravitational force as Earth was in the atmosphere (let’s say the edge of the troposphere) OR on the ground (sea level)?	1
What would happen if a jet was flung into the Sun at light-speed?	1
So here’s a thought I’ve had for days now: If I send a vessel away from earth, and keep up continuous, unbroken communication while they’re moving away at a constant speed, will I be receiving their messages in real-time?	1
If we unlocked FTL travel, and decided to stream a constant, continuous broadcast the POV of the first rocket’s launch before, during, and after launch, would we still see the broadcast in real-time if the rocket accelerates to or faster than the speed of light?	1
Since there is a time lag between objects because the speed of light isn’t instant, and all celestial bodies we observe are basically pre-recorded videos of their past selves, what happens if we accelerate to or faster than the speed of light and attempt to observe them?	1