Here's why:

* Antares is a red supergiant star. It's in the later stages of its life and has expanded significantly.

* The Sun is a yellow dwarf star. It's a much smaller, younger star.

Size Comparison:

* Antares's radius: 800 times the Sun's radius

* Antares's volume: 512 million times the Sun's volume

While the Sun might seem huge to us, it's dwarfed by massive stars like Antares.