Space · #15 biggest of 1,014
How big is Arcturus (star)?
36 million km
Arcturus (star) measures 36 million km. That's about 26 Suns lined up end to end.
By the numbers
- That's 36 million km, or about 22.4 million miles.
- It's about 21.2 billion times taller than an average adult (1.7 m).
- Roughly 26 Suns could line up across it.
- Walking nonstop, you'd need about 297,619 days to travel its length.
- Out of all 1,014 things in this collection, it ranks #15 by size.
Size comparison
How Arcturus (star) stacks up against things of a similar size. Tap any bar to explore it.
Betelgeuse (star)
1,200,000,000 km
Antares (star)
1,200,000,000 km
Rigel (star)
110,000,000 km
Aldebaran (star)
61,000,000 km
Arcturus (star)
36,000,000 km
Pollux (star)
12,000,000 km
Sirius A (star)
2,400,000 km
Sun
1,392,700 km
red dwarf star
200,000 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.