# How many ants could you fit in our Galaxy? Pls help its for school.?

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• since we DO NOT KNOW the exact dimensions of our galaxy, impossible to answer your question.

• The volume of the Milky Way galaxy is 6.65x10^60 cubic meters.

An average worker ant weighs between 1 and 5 mg. Its volume is about 10 mm^3. The approximate volume of a human being 0,07 cubic meters. So you'll need about 7 million ants to fill a human body.

Dividing the volume of the milky way by the volume of a human means 9.5e+61 humans could fit in the galaxy. Multiplying that by 7 million ants per person gives a grand total of 6.65x10^68 ants

• 7,839,109,845,549,832,213,739,778,389,504,444,502,883,341,793,749,773,104,829 give or take a few .

• Ants come in many sizes.

wikipedia: Ants range in size from 0.75 to 52 millimetres , the largest species being the fossil Titanomyrma giganteum, the queen of which was 6 centimetres long with a wingspan of 15 centimetres.

pick 1cm long, 0.2 wide, 0.2 high, so volume is 1x0.2x0.2 = 0.04 cm³

0.04 cm³ x (1m/100cm)³ = 4e-8 m³

Milky way galaxy (wikipedia): Diameter 100–180 kly

Thickness of thin stellar disk ≈2 kly.

so it's a disk 100 kly diameter, 2 kly thick.

Volume is πr²d = 3•50²•2 = 6•2500 = 15000 kly³

15000 kly³ x (1ly/1000ly)³ = 15e12 ly³

1 ly = 1e16 m

15e12 ly³ x (1e16 m / ly)³ = 15e60 m³

finally

15e60 m³ / 4e-8 m³ = 4e68

which is 4 followed by 68 zeros.