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.
Sails that are pushed by light is one concept.
They did not, so the question is misguided.
this thing dose not give u the answer!!!!!! does is spelled D-O-E-S smart 1
Nobody has ever traveled at the speed of light, and I can promise you that nobody ever will.
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.
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.
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!
Roemer was the first to measure the speed of light.
it would take apporximately 4.2 seconds, jduging the wind speed in space, if light speed technology did exist.
The speed of light is faster than the speed of sound
First of all, you would have to be dead to go to heaven or hell. So basically, the answers is no.
Are you asking when the speed of light was first estimated, or are you asking when the speed of light was first actually measured?