What are the limitations of present space travel? (thoughts please)?

upto now our scienticts know the universe upto 10 power 25 metres from the earth

the need for speed! travel faster
making the human body 'go the distance'


"apparently" the US government already have in their possession such technology , makes you wonder why we are still stuck will cars and planes.

That presented by present technology. Ah, but the future is ours to dream of and those of other generations to bring to life.

Gravity and distance are the two main limitations. It takes a huge amount of energy to attain the escape velocity needed to send a ship out of earth's gravity. That's the main reason why space travel is so expensive. Also, the distances involved are absolutely HUGE. A trip to Mars would take years, and that's just a nearby planet. Some of our probes which were launched in the 1970s haven't even left the solar system yet. A trip to another star is totally out of the question with current technology; that would take tens of thousands of years!

I think at the end of the day, we humans are just too small, and the universe is just too huge, for us to any serious space travel. We can hardly go to the other edge of our galaxy, let alone venturing into another galaxy.

Even lights has its limit as to how fast it can travel. We can never practically travel as fast as that.

The universe may be stranger than what our intellectual capabilities can comprehend, but if we don't even know about that higher level of reality, obviously we cannot utilize such features of characteristic of the universe to do stuff like warping to another end of the universe in a blink of an eye.