Western Washington University   College of Sciences and Technology   Physics/Astronomy Dept.   Bellingham, WA USA
How Big is Big?
The quantity of matter per unit length, area, or volume of a body.
Mass   Velocity   Acceleration   Momentum   Radius   Density
proton 3.20 x 1015 kg/m3
hydrogen atom 3.20 x 103 kg/m3

ping pong ball 87.3 kg/m3
baseball 648 kg/m3
basketball 86.3 kg/m3
bowling ball 1.33 x 103 kg/m3

Grand Coulee Dam 1.387 x 103 kg/m3

Rock of Gibraltar 2.00 x 103 kg/m3
Moon 3.3 x 103 kg/m3
Earth 5.5 x 103 kg/m3
Jupiter 1.25 x 103 kg/m3

Sun 1.4 x 103 kg/m3
Betelgeuse (red giant) 5.23 x 10-6 kg/m3
Pleiades (open cluster) 2.41 x 10-18 kg/m3
Lagoon Nebula 1.56 x 10-18 kg/m3
M13 (globular cluster) 5.18 x 10-19 kg/m3

Milky Way Galaxy 4.51 x 10-22 kg/m3
Local Group 5.23 x 10-26 kg/m3
galactic core 1.82 x 103 kg/m3
Virgo supercluster 4.81 x 10-24 kg/m3
Universe (if H0 = 80) 3.06 x 10-26 kg/m3