Space · #1 biggest of 1,014
How big is the observable Universe?
93 billion light-years across
The observable Universe measures 93 billion light-years across. That's about 632 quadrillion Suns lined up end to end.
By the numbers
- In everyday units that's roughly 880 sextillion km — a distance light itself needs about 93 billion years to cross.
- It's about an almost unimaginable number of times taller than an average adult (1.7 m).
- Roughly 632 quadrillion Suns could line up across it.
- Walking nonstop, you'd need about 7.28 sextillion days to travel its length.
- Out of all 1,014 things in this collection, it ranks #1 by size.
Size comparison
How observable Universe stacks up against things of a similar size. Tap any bar to explore it.
observable Universe
880,000,000,000,000,000,000,000 km
Local Group
95,000,000,000,000,000,000 km
Andromeda galaxy
2,000,000,000,000,000,000 km
Milky Way galaxy
950,000,000,000,000,000 km
Orion Nebula
230,000,000,000,000 km
Bars use a logarithmic scale so everything fits — real differences are even more extreme!
Fun fact
Standing beside it, an average person (1.7 m tall) would reach only about less than 0.001% of its height.
More in Space
Tip: swipe, use the arrow keys, or scroll past the edge to jump between sizes.