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The observable universe contains as many as an estimated 2 trillion galaxies [41] [42] [43] and, overall, as many as an estimated 10 24 stars [44] [45] – more stars (and, potentially, Earth-like planets) than all the grains of beach sand on planet Earth.
Latin. Genre. Googology, Astronomy. The Sand Reckoner (Greek: Ψαμμίτης, Psammites) is a work by Archimedes, an Ancient Greek mathematician of the 3rd century BC, in which he set out to determine an upper bound for the number of grains of sand that fit into the universe. In order to do this, Archimedes had to estimate the size of the ...
The observable universe contains as many as an estimated 2 trillion galaxies [101] [102] [103] and, overall, as many as an estimated 10 24 stars [104] [105] – more stars (and earth-like planets) than all the grains of beach sand on planet Earth; [106] [107] [108] but less than the total number of atoms estimated in the universe as 10 82; [109 ...
The image shows the galaxy cluster SMACS 0723 as it appeared 4.6 billion years ago, [4] covering an area of sky with an angular size approximately equal to a grain of sand held at arm's length. [3] Many of the objects in the image have undergone notable redshift due to the expansion of space over the extreme distance traveled by the light ...
Universe Sandbox is a series of interactive space sandbox gravity simulator educational software video games.Using Universe Sandbox, users can see the effects of gravity on objects in the universe and run scale simulations of the Solar System, various galaxies or other simulations, while at the same time interacting and maintaining control over gravity, time, and other objects in the universe ...
Discovered through gamma-ray burst mapping. Largest-known regular formation in the observable universe. [8] Huge-LQG (2012–2013) 4,000,000,000 [9] [10] [11] Decoupling of 73 quasars. Largest-known large quasar group and the first structure found to exceed 3 billion light-years. "The Giant Arc" (2021) 3,300,000,000 [12] Located 9.2 billion ...
Eddington number. Arthur Stanley Eddington (1882–1944) In astrophysics, the Eddington number, NEdd, is the number of protons in the observable universe. Eddington originally calculated it as about 1.57 × 1079; current estimates make it approximately 1080. The term is named for British astrophysicist Arthur Eddington, who in 1940 was the ...
UY Scuti (BD-12°5055) is a red supergiant star, located 5,900 light-years away in the constellation Scutum. It is also a pulsating variable star, with a maximum brightness of magnitude 8.29 and a minimum of magnitude 10.56, which is too dim for naked-eye visibility. It is considered to be one of the largest known stars, with a radius estimated ...