?No, astronauts have not "already found a planet like earth."
no, nobody has made a device that travels that fast without carrying humans.
Yup there is a planet , sorry for misunderstanding my statement what I actually mean is that they actually found a planet that can support human lives.
As I have said on the device, they already have been created a device that discovered the planet that I was saying. If they were able to do so then later on they can surely create a device that can travel that fast that also carries humans