Size comparison: Pistol Star vs Sun

Size comparison between the two stars, the Pistol Star and the Sun.

This star is one of the most massive known. It is found in the constellation of Sagittarius, specifically in the quintuplet cluster at the center of the galaxy. It is relatively young and will explode as a supernova or hypernova in 3 million years. She is in a surrounding nebulosity.

Object	Pistol Star	Sun
Type	Star, blue hypergiant	Star, yellow dwarf
Age	4 million years	4.6 billion years
Diameter	584,927,280 km	1,392,684 km
Mean radius	292,463,640 km	696,342 km
Mass	5.44 × 1031 kg	1.98 × 1030 kg
Circumference	1.8 billion km	4.3 million km
Surface area	1.07 × 1018 km2	6.09 × 1012 km2
Volume	1.04 × 1026 km3	1.41 × 1018 km3
Sun distance	25,000 light years	0 km
Luminosity	1.26 × 1033 W	3.82 × 1026 W
Photosphere temperature	12,000 K	5,772 K
Distance from the Milky Way center	-	27,200 light years
Metallicity	0.1	0.0122
Spectral classification	LBV	G2V
Right ascension	17h 46m 15.3s	19h 4m 30s
Declination	−28° 50′ 04″	+63.87°

Note: if one of the objects is not visible, it just means that it is too tiny to be displayed compared to the other one.