If we define the edge of the Universe as the farthest object we could reach if we started our journey immediately, then our current limit is a mere distance of 18 billion light-years, covering only 6% of the volume of our observable Universe. If you think that all the challenges of “local space travel” can be solved (we think so, for now), you might want to focus your attention on the stars. Polyakov spent nearly 438 consecutive days aboard the Mir space station, from January 1994 to March 1995.And while Buzz Lightyear may see limitless opportunities to travel to space, the reality is a little different. Here's how far we've traveled in space, as well as some other interesting attempts to understand the big unknown.
The fungi discovered in Chernobyl survive thanks to radiation, and could one day be used as a living protection system in spaceships and human habitats. It is likely that the animals that have traveled farthest in space are two Russian turtles from Zond 5 in 1968.The space between galaxies (unless they're very close) widens with each passing second. Everything you put on a mission to go to space costs fuel, so the more fuel you have, so going faster will make it weigh more, so there is a balance between power and efficiency, and we always try to make it as light as possible. Depending on the reference point, traveling through space can vary between 40,000 km and 47 million km per day.
Subatomic particles that circulate at the speed of light hit the aluminum shell of the spacecraft and produce radiation that can cause cancer and Alzheimer's in astronauts who stay awake too long.