How quickly can we travel 'way out there'? Can 'they' detect us and travel to here?

[6EQUJ5]

There are 400 billion stars (i.e. 'suns') in our Milky Way galaxy, probably all of them having planets orbiting them. There are at least 2,000 billion galaxies in the known universe, there may well be more, we do not yet know. So how far are human beings (or indeed any life forms) ever likely to travel? Well, if we could travel at the speed of light it would take 200,000 years to travel across just our Milky Way galaxy. In the great scheme of things that is nowhere.

Are we ever likely to travel at the speed of light? No, thus far the fastest crewed spacecraft ever constructed would have to travel at 270 times its best speed in order to achieve a speed slightly less than 1% of the speed of light.

It is a fundamental law of physics that the only thing that can travel faster than the speed of light is the ongoing expansion of the universe. Nothing with mass can travel at the speed of light. Anything in the radio spectrum has no mass and can travel at the speed of light. Such things in the radio spectrum are radio signals, television signals, radar signals, radio telescope signals, laser signals etc.

Former D-Ream keyboard player Brian Cox reckons that in the Milky Way there are either zero or 1 other intelligent civilisations. Outside the Milky Way there may be more but even if we detect any we will not meet them and communications travelling at the speed of light may take hundreds of thousands of years to travel in each direction. Our crewed craft will not travel outside the Milky Way. Even getting near to the edge of the Milky Way is extremely unlikely. This is because on Earth we are a distance (yes, distance) of 50,000 light years from the centre of the Milky Way and 50,000 light years from the edge of the Milky Way. So, at light speed it would take us 50,000 years to reach the edge of the Milky Way. As described above our fastest crewed craft to date would need accelerating by 270 times to reach slightly less than 1% of light speed.

It is highly unlikely that there is an intelligent civilisation within a distance of 1,000 light years. We have searched by radio telescope. From further away than that they will not know that we exist because they will detect Earth as it was 1,000 years ago. I.e. it takes 1,000 years for light / radio signals / television signals / radar signals / laser signals etc to travel a distance of 1,000 light years from Earth to wherever 'they' are. The civilisation will not detect any signs of technology nor any signs of the gases in the atmosphere being altered, so no sign of intelligent life on Earth.

We are travelling nowhere and nobody is travelling towards us. Nobody knows that we exist. No matter how scientifically advanced a civilisation is it cannot break the laws of physics, especially in terms of speed of travel.

The above is science fact. There are eccentric people, especially in the USA who do not like science fact. They make up science fiction and try to present it as science fact. They refuse to get their science fiction scientifically tested.