Space · #17 biggest of 1,014
How big is Sirius A (star)?
2.4 million km
Sirius A (star) measures 2.4 million km. That's about 188 Earths lined up end to end.
By the numbers
- That's 2.4 million km, or about 1.49 million miles.
- It's about 1.41 billion times taller than an average adult (1.7 m).
- Roughly 188 Earths could line up across it.
- Walking nonstop, you'd need about 19,841 days to travel its length.
- Out of all 1,014 things in this collection, it ranks #17 by size.
Size comparison
How Sirius A (star) stacks up against things of a similar size. Tap any bar to explore it.
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
Jupiter
139,822 km
Saturn
116,464 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.