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None. No astronaut or man-made object has ever gotten close to the speed of light. It is impossible for an object to actually travel at the speed of light.

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9y ago

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What might the astronauts use to get up to light speed instead of engines?

Sails that are pushed by light is one concept.


How did first astronauts get to light speed?

They did not, so the question is misguided.


What did the astronauts use to get up to the speed of light only in stead of engines?

this thing dose not give u the answer!!!!!! does is spelled D-O-E-S smart 1


How did early astronauts travel the speed of light?

Nobody has ever traveled at the speed of light, and I can promise you that nobody ever will.


What travels at light speed besides engines?

Particles that have no mass, such as photons, travel at the speed of light in a vacuum. These particles exhibit wave-particle duality and can behave both as waves and particles. Light, as a form of electromagnetic radiation, also travels at the speed of light.


What did the first astronauts use to get up to light speed instead of engines?

Perhaps this will change with future advancements, but given our current knowledge no astronauts would ever reach the speed of light or even get close. One possibility for very extended journies would be something like the particle engines that are being developed. These engines (that put out a stream of sub-atomic particles) produce almost no thrust, but they can produce their low thrust non-stop for very long periods of time. After a few years, the results could be spectacular with fuel requirements that might be manageable. Then, coming to a stop would be the challenge. Imagine a massive engine failure, and watching your destination fly by at perhaps ten or twenty percent the speed of light. Disheartening to say the least.


What did the first astronauts use to get light speed to travel distant stars instead of engines?

Oh, dude, they totally used warp drives! You know, like in Star Trek? It's all about bending space-time and cruising through the universe at ridiculous speeds. Forget engines, we're talking about bending the rules of physics here!


Who try to measure the speed of light?

Roemer was the first to measure the speed of light.


How long would it take to get to mars using conventional spacecrafts or If a spacecraft had light speed engines?

it would take apporximately 4.2 seconds, jduging the wind speed in space, if light speed technology did exist.


If A large jet flying overhead is low enough so that a man on the ground can hear its engines. The man sees the jet before he hears the engines because?

The speed of light is faster than the speed of sound


If you were alive and went to heaven would you feel gravity like the astronauts if you went at or faster than the speed of light?

First of all, you would have to be dead to go to heaven or hell. So basically, the answers is no.


When did scientists attempt to measure the speed of light?

Are you asking when the speed of light was first estimated, or are you asking when the speed of light was first actually measured?