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. But what about space travel within our own galaxy? How far have we gone and what are the limits of our exploration? Let's take a look at some of the most interesting attempts to understand the big unknown. The record for longest continuous stay in space is held by Valeri Polyakov, who spent nearly 438 consecutive days aboard the Mir space station, from January 1994 to March 1995. While Buzz Lightyear may see limitless opportunities to travel to space, the reality is a little different. 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. This is why it is important to understand how far we can go into space and what kind of risks are associated with long-term space travel. The possibilities for exploration are endless. With advances in technology and an ever-growing understanding of our Universe, there is no telling how far we can go into space.
From discovering new planets to uncovering secrets about our own galaxy, there is much to be explored. With continued research and development, we may one day be able to reach even further into space than ever before.
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