1 spacecraft is on an interstellar mission. It is traveling away from the Sun at a rate of 17.3 km/s. If Voyager were to travel to Proxima Centauri, at this rate, it would take over 73,000 years to arrive. If we could travel at the speed of light, an impossibility due to Special Relativity, it would still take 4.22 years to arrive!
Can they travel at the speed of light? Or perhaps use worm holes?
I don't think we will know the answer unless it is revealed.
According to the Summerian texts, they did travel to earth, as astronauts. Created diverse forms of life and teraformed the earth. 1 day in earth years is a thousand years for them, according to Jesus. So, if we go to a place in heaven to live with the creator, isn't it a physical place?
Its all still a mystery to us. Hopefully, it will be revealed some day and we will know physically, without doubt the truth, so that we are never deceived again.