Orders of magnitude (length)

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Orders of magnitude
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To help compare different orders of magnitude, the following list describes various lengths between 1.6×10⁻³⁵ m and 1.3×10²⁶ m.

List of orders of magnitude for length
Factor (m) Multiple Value Item
10⁻³⁵ Planck length; size of a string; lengths smaller than this do not make any physical sense, according to current theories of physics
. . .
10⁻²⁴ 1 yoctometre (ym)
10⁻²¹ 1 zeptometre (zm)
10⁻¹⁸ 1 attometre (am) upper limit for the size of quarks and electrons
sensitivity of the LIGO detector for gravitational waves
10⁻¹⁵ 1 femtometre (fm) size of a proton
classical electron radius
10⁻¹⁴ 10 fm scale of the atomic nucleus
range of the weak nuclear force
10⁻¹³ 100 fm
10⁻¹² 1 picometre (pm) distance between atomic nuclei in a white dwarf
wavelength of gamma rays
2.4 pm Compton wavelength of electron
5 pm wavelength of shortest X-rays
10⁻¹¹ 10 pm 25 pm radius of hydrogen atom
31 pm radius of helium atom
53 pm Bohr radius
10⁻¹⁰ 100 pm wavelength of X-rays
100 pm 1 Ångström
100 pm (0.1 nm) covalent radius of sulfur atom
126 pm (0.126 nm) covalent radius of ruthenium atom
135 pm (0.135 nm) covalent radius of technetium atom
153 pm (0.153 nm) covalent radius of silver atom
154 pm (0.154 nm) length of a typical covalent bond (C–C).
155 pm (0.155 nm) covalent radius of zirconium atom
175 pm (0.175 nm) covalent radius of thulium atom
225 pm (0.225 nm) covalent radius of caesium atom
500 pm (0.50 nm) width of protein α helix
10⁻⁹ 1 nanometre (nm) 1 nm diameter of Carbon nanotube
2 nm diameter of DNA helix
3.4 nm length of a DNA turn (10 bp)
3 × 8 nm size of an albumin protein molecule
6 - 10 nm thickness of cell membrane
10⁻⁸ 10 nm 10 nm typical diameter of nanowire
10 nm thickness of cell wall in gram-negative bacteria
20 nm thickness of bacterial flagellum
20 - 80 nm thickness of cell wall in gram-positive bacteria
40 nm extreme ultraviolet wavelength
65 nm Feature size of Intel chips (as of 2006)
90 nm human immunodeficiency virus (HIV) (generally, viruses range in size from 20 nm to 450 nm)
10⁻⁷ 100 nm size of chromosomes
100 nm 90% of particles in wood smoke are smaller than this
120 nm typical penetrating particle size for a ULPA (Ultra Low Penetration Air) filter (removes up to 99.999% at 0.12 micrometers) and a SULPA (Super ULPA) filter (removes up to 99.9999% at 0.12 micrometers)
280 nm near ultraviolet wavelength
300 nm most-penetrating particle size for a HEPA (High Efficiency Particulate Air) filter (N100 removes up to 99.97% at 0.3 micrometers, N95 removes up to 95% at 0.3 micrometers)
380–430 nm wavelength of violet light—see color and optical spectrum
430–450 nm wavelength of indigo light
450–500 nm wavelength of blue light
500–520 nm wavelength of cyan light
520–565 nm wavelength of green light
565–590 nm wavelength of yellow light
590–625 nm wavelength of orange light
625–740 nm wavelength of red light
10⁻⁶ 1 micrometre (µm) 1 µm also called 1 micron
1-3 µm particle size that a surgical mask removes at 80-95% efficiency
1–10 µm diameter of typical bacterium
1.55 µm wavelength of light used in optical fibre
6–8 µm diameter of a human red blood cell
6 µm anthrax spore
7 µm width of strand of Spider web web [link]
7 µm diameter of the nucleus of typical eukariotic cell
10⁻⁵ 10 µm 10 µm typical size of a fog, mist or cloud water droplet
10 µm width of cotton fibre
10.6 µm wavelength of light emitted by a Carbon dioxide laser
12 µm width of Acrylic fibre
13 µm width of nylon fibre
14 µm width of polyester fibre
15 µm width of silk fibre
17 µm dust mite excreta [¹]
20 µm width of wool fibre
25.4 µm 1/1000 inch, commonly referred to as 1 mil
50 µm typical length of Euglena gracilis, a flagellate protist
80 µm average width of human hair (ranges from 18 to 180 µm)
10⁻⁴ 100 µm 125 µm dust mite
200 µm typical length of Paramecium caudatum, a ciliate protist
300 µm diameter of Thiomargarita namibiensis, the largest bacterium ever discovered
500 µm MEMS micro-engine
500 µm diameter of a human ovum
500 µm typical length of Amoeba proteus, an amoeboid protist
10⁻³ 1 millimetre (mm) 2.54 mm distance between pins in old DIP (dual-inline-package) electronic components
5 mm length of average red ant
7.62 mm common military ammunition size
10⁻² 1 centimetre (cm) 1.5 cm length of a large mosquito
2.54 cm 1 inch
3.1 cm 1 attoparsec (10⁻¹⁸ parsecs)
4.267 cm diameter of a Golf ball
10⁻¹ 1 decimetre (dm) 10 cm wavelength of the highest UHF radio frequency, 3 GHz
10 cm diameter of the cervix upon entering the second stage of labour
10.16 cm 1 hand used in measuring height of horses (4 inches)
12 cm wavelength of the 2.45 GHz ISM radio band
15 cm height of a Lilliputian from Gulliver's Travels
22 cm diameter of a typical soccer ball
30.48 cm 1 foot
50-65 cm a pizote's tail
66 cm length of the longest pine cones (produced by the sugar pine)
90 cm average length of a rapier, a fencing sword
91 cm 1 yard
10⁰ 1 metre 10⁰ wavelength of the lowest UHF and highest VHF radio frequency, 300 MHz
1.435m Standard gauge of railway track
1.7 m (5 feet 7 inches) average height of a human being
2.45 m highest jump by a human being (Javier Sotomayor)
2.72 m tallest known human being (Robert Wadlow)
2.77 - 3.44 m wavelength of the broadcast radio FM band 87–108 MHz
3.048 m (10 feet) height of the basket in basketball
5.5 m height of tallest animal, the giraffe
8.95 m longest jump by a human being (Mike Powell)
10¹ 1 decametre (dam) 10 m wavelength of the lowest VHF and highest shortwave radio frequency, 30 MHz
18.44 m (60 feet 6 inches) distance between the pitcher's rubber and home plate on a baseball field
20 m length of a cricket pitch
21 m height of High Force waterfall in England.
23 m height of the obelisk of the Place de la Concorde, Paris.
25 m wavelength of the broadcast radio shortwave band at 12 MHz
27.43 m (90 feet) distance between bases on a baseball field
30 m length of a blue whale, the largest animal
31 m wavelength of the broadcast radio shortwave band at 9.7 MHz
40 m average depth beneath the seabed of the Channel tunnel
49 m width of an American football field (53 1/3 yards)
49 m wavelength of the broadcast radio shortwave band at 6.1 MHz
52 m height of Niagara Falls
55 m height of the Leaning Tower of Pisa
62 m Height of Pyramid of Djoser
70 m width of a typical soccer field
70 m length of the Bayeux Tapestry
88.40 m wingspan of the Antonov An-225 transport aircraft
91.44 m length of an American football field (100 yards, measured between the goal lines)
10² 1 hectometre (hm) 100 m wavelength of the lowest shortwave radio frequency and highest medium wave radio frequency, 3 MHz
105 m length of a typical soccer field
109.73 m total length of an American football field (120 yards, including the end zones)
112.34 m height of the world's tallest tree, a Coast redwood
137 m (147 m) height (present/original) of the Great Pyramid of Giza
187 m shortest wavelength of the broadcast radio AM band, 1600 kHz
244 m height of the City Gate building in Ramat-Gan, Israel
300 m height of the Eiffel Tower
340 m distance sound travels in air in one second; see speed of sound
400–500 m approximate heights of the world's tallest skyscrapers of the past 70 years.
458 m length of the Knock Nevis, the world's largest supertanker
541 m (1,776 ft) height of the planned Freedom Tower at the World Trade Center site
553.33 m height of the CN Tower, the world's tallest free-standing land structure
555 m longest wavelength of the broadcast radio AM band, 540 kHz
647 m height of the Warsaw radio mast, formerly the tallest man-made structure, collapsed in 1991
979 m height of the Salto Angel, the world's highest free-falling waterfall (Venezuela)
10³ 1 kilometre (km) 1 km wavelength of the lowest medium wave radio frequency, 300 kHz
1609 m 1 international mile
1852 m 1 nautical mile
1991 m Span of the Akashi-Kaikyo Bridge, largest in the world as of June 2006
2309 m Axial length of the Three Gorges Dam, the largest dam in the world
8848 m height of the highest mountain on earth, Mount Everest
10⁴ 10 km 10.911 km depth of deepest part of the ocean, Mariana Trench
25 km height of the highest known mountain of the solar system, Olympus Mons on Mars
31.1 km highest parachute jump (Joseph Kittinger)
33 km narrowest width of the English Channel at the Strait of Dover
34.668 km highest manned balloon flight (Malcolm D. Ross and Victor E. Prather)
38.422 km length of the Lake Pontchartrain Causeway, as of June 2006, the longest bridge in the world
42.195 km length of the Marathon, the longest mainstream long-distance road running event
53.9 km length of the Seikan Tunnel, as of February 2006, the longest in the world
10⁵ 100 km 111 km one degree of latitude on Earth
560 km distance of Bordeaux-Paris, formerly the longest one-day professional cycling race
804.672 km (∼500 miles) distance of the Indy 500 automobile race
975 km greatest diameter of the largest solar system asteroid, 1 Ceres
10⁶ 1,000 km = 1 megametre (Mm) 3,480 km diameter of the Moon
5,200 km typical distance covered by the winner of the 24 hours of Le Mans automobile endurance race
6,400 km length of the Great Wall of China
6,600 km approximate length of the two longest rivers, the Nile and the Amazon
7,821 km length of the Trans-Canada Highway
10⁷ 10,000 km 12,756 km equatorial diameter of the Earth
40,075 km length of the Earth's equator
10⁸ 100,000 km 142,984 km diameter of Jupiter
384,000 km = 384 Mm Moon's orbital distance from Earth
10⁹ 1 million km = 1 gigametre (Gm) 1,390,000 km = 1.39 Gm diameter of the Sun
3,600,000 km = 3.6 Gm greatest mileage ever recorded by a car (A 1966 Volvo P-1800S, still driving)
10¹⁰ 10 million km
10¹¹ 100 million km 150 million km = 150 Gm 1 astronomical unit (AU); mean distance between Earth and Sun.
~ 900 Gm optical diameter of Betelgeuse
10¹² 1000 million km = 1 terametre (Tm) orbital distance of Saturn from Sun
orbital distance of Pluto from Sun
10¹³ 10 Tm distance of the Voyager 1 spacecraft from sun (as of November 2005), the farthest man-made object so far
10¹⁴ 100 Tm
10¹⁵ 1 petametre (Pm) = 1 light year distance travelled by light in one year; at its current speed, Voyager 1 would need 17,500 years to travel this distance
10¹⁶ 10 Pm (3.08568 m = 30.8568 Pm) 1 parsec
4.22 light years = 39.9 Pm distance to nearest star (Proxima Centauri)
10¹⁷ 100 Pm
10¹⁸ 1 exametre (Em)
10¹⁹ 10 Em
10²⁰ 100 Em 10,000 light years
10²¹ 1 zettametre (Zm) 100,000 light years diameter of galactic disk of Milky Way Galaxy
50 kiloparsecs distance to SN 1987A, the most recent naked eye supernova
parsecs = 1.6 m = 1.6 Zm distance to the Large Magellanic Cloud (a dwarf galaxy orbiting the Milky Way)
distance to the Small Magellanic Cloud (another dwarf galaxy orbiting the Milky Way)
10²² 10 Zm 22.3 Zm = 2.36 million light years
= 725 kiloparsecs = 22.3 Zm distance to Andromeda Galaxy
50 Zm (1.6 Mpc) diameter of Local Group of galaxies
10²³ 100 Zm 300–600 Zm = 10–20 megaparsecs distance to Virgo cluster of galaxies
10²⁴ 1 yottametre (Ym) 200 million light years
= 2 Ym = 60 megaparsecs diameter of the Local Supercluster
500 million light years
= 5 Ym = 150 megaparsecs
10²⁵ 10 Ym
10²⁶ 100 Ym = 10²⁶ m = 100 Ym estimated distance to certain quasars
= 1.37×10²⁶ m = 137 Ym approx. size of the visible universe / distance the cosmic background radiation has travelled since the Big Bang

Orders of magnitude (length)

See also

External links

Factor (m)	Multiple	Value	Item
10⁻³⁵			Planck length; size of a string; lengths smaller than this do not make any physical sense, according to current theories of physics
. . .
10⁻²⁴	1 yoctometre (ym)
10⁻²¹	1 zeptometre (zm)
10⁻¹⁸	1 attometre (am)		upper limit for the size of quarks and electrons
10⁻¹⁸	1 attometre (am)		sensitivity of the LIGO detector for gravitational waves
10⁻¹⁵	1 femtometre (fm)		size of a proton
10⁻¹⁵	1 femtometre (fm)		classical electron radius
10⁻¹⁴	10 fm		scale of the atomic nucleus
10⁻¹⁴	10 fm		range of the weak nuclear force
10⁻¹³	100 fm
10⁻¹²	1 picometre (pm)		distance between atomic nuclei in a white dwarf
			wavelength of gamma rays
		2.4 pm	Compton wavelength of electron
		5 pm	wavelength of shortest X-rays
10⁻¹¹	10 pm	25 pm	radius of hydrogen atom
		31 pm	radius of helium atom
		53 pm	Bohr radius
10⁻¹⁰	100 pm		wavelength of X-rays
		100 pm	1 Ångström
		100 pm (0.1 nm)	covalent radius of sulfur atom
		126 pm (0.126 nm)	covalent radius of ruthenium atom
		135 pm (0.135 nm)	covalent radius of technetium atom
		153 pm (0.153 nm)	covalent radius of silver atom
		154 pm (0.154 nm)	length of a typical covalent bond (C–C).
		155 pm (0.155 nm)	covalent radius of zirconium atom
		175 pm (0.175 nm)	covalent radius of thulium atom
		225 pm (0.225 nm)	covalent radius of caesium atom
		500 pm (0.50 nm)	width of protein α helix
10⁻⁹	1 nanometre (nm)	1 nm	diameter of Carbon nanotube
		2 nm	diameter of DNA helix
		3.4 nm	length of a DNA turn (10 bp)
		3 × 8 nm	size of an albumin protein molecule
		6 - 10 nm	thickness of cell membrane
10⁻⁸	10 nm	10 nm	typical diameter of nanowire
		10 nm	thickness of cell wall in gram-negative bacteria
		20 nm	thickness of bacterial flagellum
		20 - 80 nm	thickness of cell wall in gram-positive bacteria
		40 nm	extreme ultraviolet wavelength
		65 nm	Feature size of Intel chips (as of 2006)
		90 nm	human immunodeficiency virus (HIV) (generally, viruses range in size from 20 nm to 450 nm)
10⁻⁷	100 nm		size of chromosomes
		100 nm	90% of particles in wood smoke are smaller than this
		120 nm	typical penetrating particle size for a ULPA (Ultra Low Penetration Air) filter (removes up to 99.999% at 0.12 micrometers) and a SULPA (Super ULPA) filter (removes up to 99.9999% at 0.12 micrometers)
		280 nm	near ultraviolet wavelength
		300 nm	most-penetrating particle size for a HEPA (High Efficiency Particulate Air) filter (N100 removes up to 99.97% at 0.3 micrometers, N95 removes up to 95% at 0.3 micrometers)
		380–430 nm	wavelength of violet light—see color and optical spectrum
		430–450 nm	wavelength of indigo light
		450–500 nm	wavelength of blue light
		500–520 nm	wavelength of cyan light
		520–565 nm	wavelength of green light
		565–590 nm	wavelength of yellow light
		590–625 nm	wavelength of orange light
		625–740 nm	wavelength of red light
10⁻⁶	1 micrometre (µm)	1 µm	also called 1 micron
		1-3 µm	particle size that a surgical mask removes at 80-95% efficiency
		1–10 µm	diameter of typical bacterium
		1.55 µm	wavelength of light used in optical fibre
		6–8 µm	diameter of a human red blood cell
		6 µm	anthrax spore
		7 µm	width of strand of Spider web web [link]
		7 µm	diameter of the nucleus of typical eukariotic cell
10⁻⁵	10 µm	10 µm	typical size of a fog, mist or cloud water droplet
		10 µm	width of cotton fibre
		10.6 µm	wavelength of light emitted by a Carbon dioxide laser
		12 µm	width of Acrylic fibre
		13 µm	width of nylon fibre
		14 µm	width of polyester fibre
		15 µm	width of silk fibre
		17 µm	dust mite excreta [¹]
		20 µm	width of wool fibre
		25.4 µm	1/1000 inch, commonly referred to as 1 mil
		50 µm	typical length of Euglena gracilis, a flagellate protist
		80 µm	average width of human hair (ranges from 18 to 180 µm)
10⁻⁴	100 µm	125 µm	dust mite
		200 µm	typical length of Paramecium caudatum, a ciliate protist
		300 µm	diameter of Thiomargarita namibiensis, the largest bacterium ever discovered
		500 µm	MEMS micro-engine
		500 µm	diameter of a human ovum
		500 µm	typical length of Amoeba proteus, an amoeboid protist
10⁻³	1 millimetre (mm)	2.54 mm	distance between pins in old DIP (dual-inline-package) electronic components
		5 mm	length of average red ant
		7.62 mm	common military ammunition size
10⁻²	1 centimetre (cm)	1.5 cm	length of a large mosquito
		2.54 cm	1 inch
		3.1 cm	1 attoparsec (10⁻¹⁸ parsecs)
		4.267 cm	diameter of a Golf ball
10⁻¹	1 decimetre (dm)	10 cm	wavelength of the highest UHF radio frequency, 3 GHz
		10 cm	diameter of the cervix upon entering the second stage of labour
		10.16 cm	1 hand used in measuring height of horses (4 inches)
		12 cm	wavelength of the 2.45 GHz ISM radio band
		15 cm	height of a Lilliputian from Gulliver's Travels
		22 cm	diameter of a typical soccer ball
		30.48 cm	1 foot
		50-65 cm	a pizote's tail
		66 cm	length of the longest pine cones (produced by the sugar pine)
		90 cm	average length of a rapier, a fencing sword
		91 cm	1 yard
10⁰	1 metre	10⁰	wavelength of the lowest UHF and highest VHF radio frequency, 300 MHz
		1.435m	Standard gauge of railway track
		1.7 m (5 feet 7 inches)	average height of a human being
		2.45 m	highest jump by a human being (Javier Sotomayor)
		2.72 m	tallest known human being (Robert Wadlow)
		2.77 - 3.44 m	wavelength of the broadcast radio FM band 87–108 MHz
		3.048 m (10 feet)	height of the basket in basketball
		5.5 m	height of tallest animal, the giraffe
		8.95 m	longest jump by a human being (Mike Powell)
10¹	1 decametre (dam)	10 m	wavelength of the lowest VHF and highest shortwave radio frequency, 30 MHz
		18.44 m (60 feet 6 inches)	distance between the pitcher's rubber and home plate on a baseball field
		20 m	length of a cricket pitch
		21 m	height of High Force waterfall in England.
		23 m	height of the obelisk of the Place de la Concorde, Paris.
		25 m	wavelength of the broadcast radio shortwave band at 12 MHz
		27.43 m (90 feet)	distance between bases on a baseball field
		30 m	length of a blue whale, the largest animal
		31 m	wavelength of the broadcast radio shortwave band at 9.7 MHz
		40 m	average depth beneath the seabed of the Channel tunnel
		49 m	width of an American football field (53 1/3 yards)
		49 m	wavelength of the broadcast radio shortwave band at 6.1 MHz
		52 m	height of Niagara Falls
		55 m	height of the Leaning Tower of Pisa
		62 m	Height of Pyramid of Djoser
		70 m	width of a typical soccer field
		70 m	length of the Bayeux Tapestry
		88.40 m	wingspan of the Antonov An-225 transport aircraft
		91.44 m	length of an American football field (100 yards, measured between the goal lines)
10²	1 hectometre (hm)	100 m	wavelength of the lowest shortwave radio frequency and highest medium wave radio frequency, 3 MHz
		105 m	length of a typical soccer field
		109.73 m	total length of an American football field (120 yards, including the end zones)
		112.34 m	height of the world's tallest tree, a Coast redwood
		137 m (147 m)	height (present/original) of the Great Pyramid of Giza
		187 m	shortest wavelength of the broadcast radio AM band, 1600 kHz
		244 m	height of the City Gate building in Ramat-Gan, Israel
		300 m	height of the Eiffel Tower
		340 m	distance sound travels in air in one second; see speed of sound
		400–500 m	approximate heights of the world's tallest skyscrapers of the past 70 years.
		458 m	length of the Knock Nevis, the world's largest supertanker
		541 m (1,776 ft)	height of the planned Freedom Tower at the World Trade Center site
		553.33 m	height of the CN Tower, the world's tallest free-standing land structure
		555 m	longest wavelength of the broadcast radio AM band, 540 kHz
		647 m	height of the Warsaw radio mast, formerly the tallest man-made structure, collapsed in 1991
		979 m	height of the Salto Angel, the world's highest free-falling waterfall (Venezuela)
10³	1 kilometre (km)	1 km	wavelength of the lowest medium wave radio frequency, 300 kHz
		1609 m	1 international mile
		1852 m	1 nautical mile
		1991 m	Span of the Akashi-Kaikyo Bridge, largest in the world as of June 2006
		2309 m	Axial length of the Three Gorges Dam, the largest dam in the world
		8848 m	height of the highest mountain on earth, Mount Everest
10⁴	10 km	10.911 km	depth of deepest part of the ocean, Mariana Trench
		25 km	height of the highest known mountain of the solar system, Olympus Mons on Mars
		31.1 km	highest parachute jump (Joseph Kittinger)
		33 km	narrowest width of the English Channel at the Strait of Dover
		34.668 km	highest manned balloon flight (Malcolm D. Ross and Victor E. Prather)
		38.422 km	length of the Lake Pontchartrain Causeway, as of June 2006, the longest bridge in the world
		42.195 km	length of the Marathon, the longest mainstream long-distance road running event
		53.9 km	length of the Seikan Tunnel, as of February 2006, the longest in the world
10⁵	100 km	111 km	one degree of latitude on Earth
		560 km	distance of Bordeaux-Paris, formerly the longest one-day professional cycling race
		804.672 km (∼500 miles)	distance of the Indy 500 automobile race
		975 km	greatest diameter of the largest solar system asteroid, 1 Ceres
10⁶	1,000 km = 1 megametre (Mm)	3,480 km	diameter of the Moon
		5,200 km	typical distance covered by the winner of the 24 hours of Le Mans automobile endurance race
		6,400 km	length of the Great Wall of China
		6,600 km	approximate length of the two longest rivers, the Nile and the Amazon
		7,821 km	length of the Trans-Canada Highway
10⁷	10,000 km	12,756 km	equatorial diameter of the Earth
10⁷	10,000 km	40,075 km	length of the Earth's equator
10⁸	100,000 km	142,984 km	diameter of Jupiter
10⁸	100,000 km	384,000 km = 384 Mm	Moon's orbital distance from Earth
10⁹	1 million km = 1 gigametre (Gm)	1,390,000 km = 1.39 Gm	diameter of the Sun
10⁹	1 million km = 1 gigametre (Gm)	3,600,000 km = 3.6 Gm	greatest mileage ever recorded by a car (A 1966 Volvo P-1800S, still driving)
10¹⁰	10 million km
10¹¹	100 million km	150 million km = 150 Gm	1 astronomical unit (AU); mean distance between Earth and Sun.
		~ 900 Gm	optical diameter of Betelgeuse
10¹²	1000 million km = 1 terametre (Tm)		orbital distance of Saturn from Sun
10¹²	1000 million km = 1 terametre (Tm)		orbital distance of Pluto from Sun
10¹³	10 Tm		distance of the Voyager 1 spacecraft from sun (as of November 2005), the farthest man-made object so far
10¹⁴	100 Tm
10¹⁵	1 petametre (Pm)	= 1 light year	distance travelled by light in one year; at its current speed, Voyager 1 would need 17,500 years to travel this distance
10¹⁶	10 Pm	(3.08568 m = 30.8568 Pm)	1 parsec
10¹⁶	10 Pm	4.22 light years = 39.9 Pm	distance to nearest star (Proxima Centauri)
10¹⁷	100 Pm
10¹⁸	1 exametre (Em)
10¹⁹	10 Em
10²⁰	100 Em	10,000 light years
10²¹	1 zettametre (Zm)	100,000 light years	diameter of galactic disk of Milky Way Galaxy
		50 kiloparsecs	distance to SN 1987A, the most recent naked eye supernova
		parsecs = 1.6 m = 1.6 Zm	distance to the Large Magellanic Cloud (a dwarf galaxy orbiting the Milky Way)
			distance to the Small Magellanic Cloud (another dwarf galaxy orbiting the Milky Way)
10²²	10 Zm	22.3 Zm = 2.36 million light years = 725 kiloparsecs = 22.3 Zm	distance to Andromeda Galaxy
10²²	10 Zm	50 Zm (1.6 Mpc)	diameter of Local Group of galaxies
10²³	100 Zm	300–600 Zm = 10–20 megaparsecs	distance to Virgo cluster of galaxies
10²⁴	1 yottametre (Ym)	200 million light years = 2 Ym = 60 megaparsecs	diameter of the Local Supercluster
10²⁴	1 yottametre (Ym)	500 million light years = 5 Ym = 150 megaparsecs
10²⁵	10 Ym
10²⁶	100 Ym	= 10²⁶ m = 100 Ym	estimated distance to certain quasars
10²⁶	100 Ym	= 1.37×10²⁶ m = 137 Ym	approx. size of the visible universe / distance the cosmic background radiation has travelled since the Big Bang