quantum foam
Quantum foam (also referred to as space-time foam) is a concept in quantum mechanics devised by John Wheeler in 1955. The foam is supposed to be conceptualized as the foundation of the fabric of the universe. Additionally, quantum foam can be used as a qualitative description of subatomic space-time turbulence at extremely small distances.
10-35 meters

neutrino
A neutrino is an electrically neutral, weakly interacting elementary subatomic particle. The neutrino (meaning 'little neutral one' in Italian) is denoted by the Greek letter ν. All evidence suggests that neutrinos have mass but the upper bounds established for their mass are tiny even by the standards of subatomic particles.
10-24 meters

preon
In particle physics, preons are 'point-like' particles, conceived to be subcomponents of quarks and leptons. The word was coined by Jogesh Pati and Abdus Salam in 1974. Interest in preon models peaked in the 1980s but has slowed as the Standard Model of particle physics continues to describe the physics mostly successfully
10-21 meters

electron core
The electron is a subatomic particle with a negative elementary electric charge. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure.
10-18 meters

proton
The proton is a subatomic particle and a positive electric charge of 1 elementary charge. Protons and neutrons are collectively referred to as 'nucleons'. The name proton was given to the hydrogen nucleus by Ernest Rutherford in 1920.
10-15 meters

uranium nucleus
Uranium is a silvery-white metallic chemical element in the actinide series of the periodic table, with symbol U and atomic number 92. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.
10-14 meters

gamma ray
Gamma radiation, also known as gamma rays, and denoted by the Greek letter γ, refers to electromagnetic radiation of extremely high frequency and therefore high energy per photon. Gamma rays are ionizing radiation, and are thus biologically hazardous.
10-12 meters

angstrom
The angstrom is often used in the natural sciences and technology to express the sizes of atoms, molecules, and microscopic biological structures, the lengths of chemical bonds, the arrangement of atoms in crystals, the wavelengths of electromagnetic radiation, and the dimensions of integrated circuit parts.
10-10 meters

carbon nanotube
Carbon nanotubes (CNTs) are allotropes of carbon with a cylindrical nanostructure. These cylindrical carbon molecules have unusual properties, which are valuable for nanotechnology, electronics, optics and other fields of materials science and technology.
10-9 meters

cell membrane
The cell membrane (also known as the plasma membrane or cytoplasmic membrane) is a biological membrane that separates the interior of all cells from the outside environment. The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells.
10-8 meters

largest virus
A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to bacteria and archaea. Viral infections in animals provoke an immune response that usually eliminates the infecting virus.
10-7 meters

white blood cell
White blood cells (WBCs), also called leukocytes or leucocytes, are the cells of the immune system that are involved in defending the body against both infectious disease and foreign invaders. The number of white blood cells in the blood is often an indicator of disease.
10-5 meters

human hair
Hair is a filamentous biomaterial that grows from follicles found in the dermis. Hair is one of the defining characteristics of mammals. The human body, apart from areas of glabrous skin, is covered in follicles which produce thick terminal and fine vellus hair.
10-4 meters

grain of sand
Sand is a naturally occurring granular material composed of finely divided rock and mineral particles. The composition of sand is highly variable, depending on the local rock sources and conditions, but the most common constituent of sand in inland continental settings and non-tropical coastal settings is silica, usually in the form of quartz.
10-3 meters

coffee bean
A coffee bean is a seed of the coffee plant, and is the source for coffee. It is the pit inside the red or purple fruit often referred to as a cherry. Even though they are seeds, they are referred to as 'beans' because of their resemblance to true beans.
10-2 meters

cup
A cup is a small, open container used for carrying and drinking drinks. It may be made of wood, plastic, glass, clay, metal, stone, china or other materials, and may have a stem, handles or other adornments.
10-1 meters

human
Modern humans are the only extant members of the hominin clade, a branch of great apes characterized by erect posture and bipedal locomotion; manual dexterity and increased tool use; and a general trend toward larger, more complex brains and societies.
1.7 meters

giant earthworm
An earthworm is a tube-shaped, segmented animal commonly found living in soil, that feeds on live and dead organic matter. Its digestive system runs through the length of its body. It conducts respiration through its skin.
7 meters

oak tree
An oak is a tree or shrub in the genus Quercus, having approximately 600 extant species. The common name 'Oak' may also appear in the names of species in related genera, notably Lithocarpus. The genus is native to the Northern Hemisphere, and includes deciduous and evergreen species extending from cool temperate to tropical latitudes in Asia and the Americas.
20 meters

redwood tree
Sequoioideae (redwoods) is a subfamily in the family Cupressaceae. The redwood species contains the largest and tallest trees in the world. These trees can live to an age of thousands of years. The entire subfamily is endangered.
0.1 kilometers

hoover dam
Hoover Dam, once known as Boulder Dam, is a concrete arch-gravity dam in the Black Canyon of the Colorado River, on the border between the U.S. states of Arizona and Nevada. It was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30, 1935, by President Franklin D. Roosevelt.
0.2 kilometers

eiffel tower
The Eiffel Tower is an iron lattice tower located on the Champ de Mars in Paris. It was named after the engineer Gustave Eiffel, whose company designed and built the tower. The tower is the tallest structure in Paris and the most-visited paid monument in the world.
0.3 kilometers

angel falls
Angel Falls is a waterfall in Venezuela. It is the world's highest uninterrupted waterfall, with a height of 979 m (3,212 ft) and a plunge of 807 m (2,648 ft). The waterfall drops over the edge of the Auyantepui mountain in the Canaima National Park, a UNESCO World Heritage site in the Gran Sabana region of Bolívar State.
0.9 kilometers

mt everest
Mount Everest is the Earth's highest mountain. It is located in the Mahalangur section of the Himalayas. Its peak is 8,848 metres (29,029 ft) above sea level and is the 5th furthest point from the center of the Earth.
8.8 kilometers

ganymed
1036 Ganymed is the largest near-Earth asteroid, at about 32–34 km in diameter. It was discovered by Walter Baade on October 23, 1924. Owing to its early discovery date, Ganymed has a rich observational history.
32 kilometers

nereid
Nereid is the third-largest moon of Neptune. It has a highly eccentric orbit. It was the second moon of Neptune to be discovered, by Gerard Kuiper in 1949. It is named after the Nereids, sea-nymphs of Greek mythology and attendants of the god Neptune.
340 kilometers

pluto
Pluto is the largest object in the Kuiper belt, and the tenth-most-massive body observed directly orbiting the Sun. It is the second-most-massive known dwarf planet, after Eris. Like other Kuiper-belt objects, Pluto is composed primarily of rock and ice and is relatively small, approximately one-sixth the mass of the Moon and one-third its volume.
2 300 kilometers

mars
Mars is the fourth planet from the Sun and the second smallest planet in the Solar System, after Mercury. Named after the Roman god of war, it is often described as the 'Red Planet' because the iron oxide prevalent on its surface gives it a reddish appearance.
6 800 kilometers

earth
Earth is the third-closest planet to the Sun, the densest planet in the Solar System, the largest of the Solar System's four terrestrial planets and the only celestial body known to accommodate life. It is home to millions of species, including a global population of humans, that are supported and nourished by its biosphere and minerals.
12 700 kilometers

uranus
Uranus is the seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Uranus is similar in composition to Neptune, and both are of different chemical composition than the larger gas giants Jupiter and Saturn.
51 000 kilometers

jupiter
Jupiter is the fifth planet from the Sun and the largest planet in the Solar System. It is a gas giant with mass one-thousandth of that of the Sun but is two and a half times the mass of all the other planets in the Solar System combined.
140 000 kilometers

alpha centauri c
Proxima Centauri is a red dwarf about 4.24 light-years from the Sun, inside the G-cloud, in the constellation of Centaurus. It was discovered in 1915 by Scottish astronomer Robert Innes, the Director of the Union Observatory in South Africa, and is the nearest known star to the Sun
280 000 kilometers

your mom
The biggest and surely, the fattest entity existing in observable Universe, your mom has taken TOP 1 place in this rating. Some of the scientists suggest that an enormous mass of your mom can be related to the dark matter, there are also speculating theories that tries to draw parallels between your mom's weight and Albert Einstein's theory of General Relativity.
approx. >9000 kajilibajilikilometers

alpha centauri b
Alpha Centauri or Toliman is the brightest star in the southern constellation of Centaurus and the third brightest star in the night sky. The Alpha Centauri system is located 4.37 light years from the Sun, making it the closest star system to our Solar System.
1 000 000 kilometers

sun
The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields. Once regarded by astronomers as a small and relatively insignificant star, the Sun is now thought to be brighter than about 85% of the stars in the Milky Way.
1 400 000 kilometers