[ErnstStavroBlofeld]

[Rummenigge]

What are we waiting for ? Let’s build this.

[GonzoGOP]

Note due to the laws of physics no ship can exceed one half the speed of its rocket exhaust. Since the exhaust can't exceed the speed of light the fastest a ship can go is .5C. So none of this matters unless someone invents a reactionless drive, and there are more than a few rules of physics that say that is also impossible.

As for an Orion, they are the coolest thing ever to come out of the mad science department. However their exhaust velocity is only 43,000 meters per second. As a comparison the Space Shuttle Main Engine is less than one tenth of that. But the speed of light is 299,792,458 meters per second. So the fastest that an Orion drive can go is .00007C. Great for a quick run out to Jupiter or Mars, but not interstellar. No need to worry about hydrogen atoms at that speed.