There was a big sunspot on the Sun last week, 23-28 September, 2003.
The sunspot, part of a region known as 'Active Region 10464', was almost as wide as three planet Earths lined up in a row.
This means it's big enough to see without magnification.
CAUTION: Never look directly at the Sun without suitable eye protection!
Now, for a really big sunspot group, click here!