Space · #7 biggest of 1,014
How big is the Oort Cloud?
1.59 light-years across
The Oort Cloud measures 1.59 light-years across. That's about 10.8 million Suns lined up end to end.
By the numbers
- In everyday units that's roughly 15 trillion km — a distance light itself needs about 1.59 years to cross.
- It's about 8.82 quadrillion times taller than an average adult (1.7 m).
- Roughly 10.8 million Suns could line up across it.
- Walking nonstop, you'd need about 124 billion days to travel its length.
- Out of all 1,014 things in this collection, it ranks #7 by size.
Size comparison
How Oort Cloud stacks up against things of a similar size. Tap any bar to explore it.
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
Crab Nebula
100,000,000,000,000 km
Oort Cloud
15,000,000,000,000 km
Solar System
29,000,000,000 km
UY Scuti (star)
2,400,000,000 km
VY Canis Majoris
1,400,000,000 km
Betelgeuse (star)
1,200,000,000 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.