How Big Are Things? Home     Welcome	small		Real world	big			solar system		between	galaxy
	nano	micro		meter	kilo		Mega	Giga	Tera	Peta	Exa

m = 100 m

look at a sheet of graph paper

galaxy		21
		20 19
local stars		18
		17 16
between		15
		14 13
E's orbit		12
		11 10
sun		9
		8 7
texas		6
		5 4
hood		3
		2 1
you		0
		-1 -2
salt grain		-3
		-4 -5
bacteria		-6
		-7 -8
atom		-9

light-microseconds ( 10-6 lt·s )
0	1	2	3	4	5

feet (ft)
0	1000	2000	3000	4000	5000

0	1	2	3	4	5
sound-seconds (in STP air)

land mile (mi)
0	1

0	1
nautical mile

acre

hectare

distance traveled by sound, in STP air
0 s	1 s	2 s	3 s	4 s	5 s

3 seconds per km, 5 seconds per mile

sound in air (STP) How many meters per second? 330 m/s.

Boston: Charles River, Prudential Building (should extend down too), sunken highway

src
Pompeii ( interactive map , conjectural detail map , ok navigation game , air photo )

src

		average ocean depth (swimming pool!)		Antartic ice sheet		average land height above sea level

Looking east up the Khumbu Icefall, with Mt. Everest (aka Sagarmatha), Lhotse and Nuptse.
Original image from here. A map.

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