The question itself is a bit vague, if one is careful not to assume 'travel' means to travel through space only. If one assumes travelling through space only, then you can come nowhere close to travelling at the speed of light through space at the current time. Current day rocket ships don't even travel close to the speed of light through space, a mere thousandth of 1% the speed of light in fact.
That being said, however, we all travel at the speed of light through space and time. When we move faster through space, we move slower through time, and when we move faster through time, we move slower through space. But the combined speed of both moving through space and time is the speed of light, or equivalent to c.
Right now, at this moment, I am completely motionless with respect to my surroundings.
From time to time, in a short burst of maximum exertion, I can briefly achieve a speed of roughly
22 feet per second with respect to my surroundings, equivalent to 0.0000000224 of light speed. (rounded)
-- The Apollo missions traveled from the Earth to the moon in 3 days.
That corresponds to an average of about 0.0005 of the speed of light.
If people don't need to go along, and we're only making objects go as fast
as possible, then we have achieved much greater speeds.
-- Regarding sizable objects that you can see or hold in your hand, we have
launched spacecraft, and then guided them past the big planets, in such a
way as to gain enough speed to escape from the solar system ... about 525 km
per second, or 1.174 million miles per hour. That's about 0.0018 of light speed.
-- Regarding objects that are too small to see, the accelerators built for research
in Particle Physics routinely push electrons and protons to 99.999% of light speed.
Individual particles have been accelerated to over 99.9% of the speed of light. Spaceship have not even reached a tenth of one percent of the speed of light.
The question "What does matter do when it achieves the speed of light ?" is a BS question, because matter cannot achieve the speed of light.
Bluer than it is.
Pretty close ... that figure is about 99.85% the speed of light. (You used 186,000 miles per second. We used 186,282 .)
Neutrinos travel so close to the speed of light we were unsure for awhile whether or not they had a rest mass.
Assuming the speed of light in air is already known (it is close to the speed of light in a vacuum), you might check how the light refracts when it changes from air to water (at what angle), and then use Snell's Law.
No, not close at all.
The question "What does matter do when it achieves the speed of light ?" is a BS question, because matter cannot achieve the speed of light.
No, because the orbital is really just an abraction - the electron isn't racing around the orbital like a racecar, so there isn't a speed. The orbital is a better measure of the electrons potential energy.
Electrons are able to travel close to speed of light.
Bluer than it is.
The Universe seems to have a speed limit, called the "speed of light". This speed limit is approximately 300,000 kilometers/second. Light travels at that speed; so do other electromagnetic waves. Gravity waves are believed to travel at the speed of light as well. Finally, it is possible for particles to travel at a speed very close to the speed of light. Neutrinos tend to travel very close to the speed of light; also, cosmic rays contain very high-energy particles which also travel very close to the speed of light.
Not in our or even the projected lifetime of humanity. V4641 is about 24 million light years from us, so even if it was travelling at light speed, it wouldn't come close to our solar system for another 24 million years.
With current technology, it is not possible to even come anywhere close to the speed of light. For example, traveling at 1/10 the speed of light is still science fiction. On the other hand, for anything that does NOT travel at the speed of light, it is impossible to actually attain the speed of light. In theory you might get close. There are some particles, such as photons and the hypothetical gravitons, which ONLY travel at the speed of light.
No. Nothing is faster than the speed of light. Even the fastest wind doesn't come close.
the same as you were if you weren't.
Approximately as close as a garden snail is to winning at Daytona.
Pretty close ... that figure is about 99.85% the speed of light. (You used 186,000 miles per second. We used 186,282 .)