The universe technically has two "edges": the particle horizon, a distance of about 46 billion light-years that brings us to the end of what we can observe in space, and the cosmic event horizon, a distance of about 16 billion light-years, beyond which we can't receive information. These are edges of mankind's devising-the universe could be infinite, in which case it would extend past these markers. But it could also be curved in a way that humans have yet to measure, and so further speculation about its shape and its boundaries is needed.
Could We Travel To The Edge Of The Universe?
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Key Facts In This Video
The observable universe measures approximately 93 billion light-years across. 01:04
We're able to see galaxies beyond the cosmic event horizon that we could never reach or signal. 03:37
It's possible that the curvature of the universe is so small that we haven't yet been able to detect it. 06:12
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