Observable universe
The observable universe is a spherical region of the Universe comprising all matter that can be observed from Earth at the present time, because electromagnetic radiation from these objects has had time to reach Earth since the beginning of the cosmological expansion . There are at least 2 trillion galaxies in the observable universe. [8] [9] Assuming the Universe is isotropic , the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe has a spherical volume (a ball ) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth .
Page Revisions
| Year | Metadata | Sections | Top Words | First Paragraph |
| 2018 |
191191 characters 17 sections 30 paragraphs 17 images 298 internal links 123 external links |
1. The universe versus the observable universe |
universe 0.463 galaxies 0.328 light 0.246 observable 0.222 redshift 0.217 comoving 0.199 billion 0.172 galaxy 0.170 emitted 0.144 distance 0.130 matter 0.116 cosmological 0.113 years 0.113 expansion 0.104 1053 0.100 |
The observable universe is a spherical region of the Universe comprising all matter that can be observed from Earth at the present time, because electromagnetic radiation from these objects has had time to reach Earth since the beginning of the cosmological expansion . There are at least 2 trillion galaxies in the observable universe. [8] [9] Assuming the Universe is isotropic , the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe has a spherical volume (a ball ) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth . |
| 2017 |
227823 characters 17 sections 30 paragraphs 17 images 334 internal links 124 external links |
1. The Universe versus the observable universe |
universe 0.464 galaxies 0.329 light 0.251 observable 0.210 redshift 0.187 comoving 0.181 billion 0.172 galaxy 0.171 distance 0.131 cosmological 0.128 matter 0.116 emitted 0.116 years 0.116 bang 0.103 1053 0.101 |
The observable universe is a spherical region of the Universe comprising all matter that can be observed from Earth at the present time, because electromagnetic radiation from these objects have had time to reach Earth since the beginning of the cosmological expansion . There are at least 2 trillion galaxies in the observable universe, [7] [8] containing more stars than all the grains of sand on planet Earth. [9] [10] [11] Assuming the Universe is isotropic , the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball ) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth . |
| 2016 |
232819 characters 17 sections 30 paragraphs 17 images 333 internal links 132 external links |
1. The Universe versus the observable universe |
universe 0.475 galaxies 0.324 light 0.223 observable 0.213 comoving 0.196 redshift 0.183 galaxy 0.168 billion 0.164 cosmological 0.154 distance 0.141 matter 0.114 emitted 0.114 years 0.109 decoupling 0.107 expansion 0.102 |
The observable universe is a spherical region of the Universe comprising all matter that may be observed from Earth at the present time, because light and other signals from these objects have had time to reach Earth since the beginning of the cosmological expansion . There are at least two trillion galaxies in the observable universe. [7] [8] Assuming the universe is isotropic , the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball ) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth. |
| 2015 |
211993 characters 20 sections 43 paragraphs 15 images 314 internal links 144 external links |
1. The Universe versus the observable universe |
universe 0.403 galaxies 0.346 comoving 0.224 1053 0.216 light 0.197 matter 0.180 observable 0.168 galaxy 0.167 redshift 0.167 billion 0.162 ordinary 0.152 distance 0.133 cosmological 0.129 stars 0.118 years 0.097 |
The observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth at the present time because light and other signals from these objects have had time to reach the Earth since the beginning of the cosmological expansion . Assuming the universe is isotropic , the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball ) centered on the observer. Every location in the Universe has its own observable universe, which may or may not overlap with the one centered on Earth. |
| 2014 |
202292 characters 20 sections 39 paragraphs 14 images 308 internal links 133 external links |
1. The Universe versus the observable universe |
universe 0.409 galaxies 0.347 comoving 0.225 1053 0.216 light 0.198 matter 0.180 galaxy 0.167 redshift 0.167 billion 0.167 ordinary 0.153 observable 0.152 distance 0.133 cosmological 0.129 stars 0.118 years 0.098 |
The observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth at the present time because light and other signals from these objects has had time to reach the Earth since the beginning of the cosmological expansion . Assuming the universe is isotropic , the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball ) centered on the observer, regardless of the shape of the universe as a whole. [ citation needed ] Every location in the universe has its own observable universe, which may or may not overlap with the one centered on Earth. |
| 2013 |
178086 characters 19 sections 37 paragraphs 13 images 283 internal links 108 external links |
1. The universe versus the observable universe |
universe 0.394 galaxies 0.351 comoving 0.234 1053 0.225 light 0.192 matter 0.181 redshift 0.174 galaxy 0.165 ordinary 0.159 observable 0.159 billion 0.152 distance 0.138 cosmological 0.134 stars 0.123 mass 0.095 |
The observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth in the present day because light (or other signals) from those objects has had time to reach the Earth since the beginning of the cosmological expansion, (see Big Bang cosmology ). Assuming the universe is isotropic , the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball ) centered on the observer, regardless of the shape of the universe as a whole. Every location in the universe has its own observable universe, which may or may not overlap with the one centered on Earth. |
| 2012 |
193329 characters 21 sections 47 paragraphs 11 images 270 internal links 107 external links |
universe 0.483 galaxies 0.311 observable 0.248 comoving 0.241 light 0.202 redshift 0.168 distance 0.159 cosmological 0.153 billion 0.143 galaxy 0.142 displaystyle 0.125 atoms 0.123 horizon 0.116 bang 0.107 stars 0.101 |
In Big Bang cosmology , the observable universe consists of the galaxies and other matter that can, in principle, be observed from Earth in the present day—because light (or other signals) from those objects has had time to reach the Earth since the beginning of the cosmological expansion. Assuming the universe is isotropic , the distance to the edge of the observable universe is roughly the same in every direction. That is, the observable universe is a spherical volume (a ball ) centered on the observer, regardless of the shape of the universe as a whole. Every location in the universe has its own observable universe, which may or may not overlap with the one centered on Earth. |
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| 2011 |
186234 characters 19 sections 42 paragraphs 11 images 263 internal links 101 external links |
universe 0.488 galaxies 0.295 observable 0.251 comoving 0.243 light 0.204 redshift 0.169 distance 0.157 billion 0.157 galaxy 0.143 cosmological 0.143 displaystyle 0.126 atoms 0.124 emitted 0.121 bang 0.108 1080 0.101 |
In Big Bang cosmology , the observable universe consists of the galaxies and other matter that we can in principle observe from Earth in the present day, because light (or other signals) from those objects has had time to reach us since the beginning of the cosmological expansion. Assuming the universe is isotropic , the distance to the edge of the observable universe is roughly the same in every direction—that is, the observable universe is a spherical volume (a ball ) centered on the observer, regardless of the shape of the universe as a whole. Every location in the universe has its own observable universe which may or may not overlap with the one centered on the Earth. |
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| 2010 |
168140 characters 19 sections 48 paragraphs 10 images 259 internal links 78 external links |
universe 0.482 galaxies 0.292 observable 0.250 comoving 0.248 light 0.205 redshift 0.175 billion 0.162 displaystyle 0.156 distance 0.154 galaxy 0.137 cosmological 0.137 stars 0.126 atoms 0.119 emitted 0.116 horizon 0.105 |
In Big Bang cosmology , the observable universe consists of the galaxies and other matter that we can in principle observe from Earth in the present day, because light (or other signals) from those objects has had time to reach us since the beginning of the cosmological expansion. Assuming the universe is isotropic , the distance to the edge of the observable universe is roughly the same in every direction—that is, the observable universe is a spherical volume (a ball ) centered on the observer, regardless of the shape of the universe as a whole. The actual shape of the universe may or may not be spherical. However, the portion of it that we (humans, from the perspective of planet Earth) are able to observe is determined by whether or not the light and other signals originating from distant objects has had time to arrive at our point of observation (planet Earth). Therefore, the observable universe appears from our perspective to be spherical. Every location in the universe has its own observable universe which may or may not overlap with the one centered around the Earth. |
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| 2009 |
78036 characters 10 sections 26 paragraphs 7 images 200 internal links 28 external links |
1. The Universe versus the observable universe 2. Size of the observable universe |
universe 0.642 observable 0.352 stars 0.198 matter 0.163 galaxies 0.157 ly 0.148 light 0.138 frac 0.130 emitted 0.117 expansion 0.114 billion 0.111 1080 0.104 comoving 0.094 cosmology 0.092 bang 0.089 |
In Big Bang cosmology , the observable universe consists of the galaxies and other matter that we can in principle observe from Earth in the present day, because light (or other signals) from those objects has had time to reach us since the beginning of the cosmological expansion. Assuming the Universe is isotropic , the distance to the edge of the observable universe is roughly the same in every direction—that is, the observable universe is a spherical volume (a ball ) centered on the observer, regardless of the shape of the Universe as a whole. The actual shape of the Universe may or may not be spherical. However, the portion of it that we (humans, from the perspective of planet Earth) are able to observe is determined by whether or not the light and other signals originating from distant objects has had time to arrive at our point of observation (planet Earth). Therefore, the observable universe appears from our perspective to be spherical. Every location in the Universe has its own observable universe which may or may not overlap with the one centered around the Earth. |
| 2008 |
72941 characters 9 sections 23 paragraphs 6 images 188 internal links 24 external links |
1. The universe versus the observable universe |
universe 0.513 observable 0.307 stars 0.263 frac 0.208 ly 0.196 galaxies 0.183 emitted 0.156 matter 0.150 light 0.138 comoving 0.125 billion 0.125 displaystyle 0.124 3 0.123 bang 0.118 cdot 0.117 |
In Big Bang cosmology , the observable universe is the region of space bounded by a sphere , centered on the observer, that is small enough that we might observe objects in it, i.e. there has been sufficient time for a signal emitted from the object at any time after the Big Bang, and moving at the speed of light, to have reached the observer by the present time. Every position has its own observable universe which may or may not overlap with the one centered around the Earth . |
| 2007 |
70285 characters 10 sections 16 paragraphs 5 images 157 internal links 21 external links |
1. The universe versus the observable universe |
universe 0.474 displaystyle 0.309 observable 0.289 ly 0.272 stars 0.257 frac 0.216 galaxies 0.190 comoving 0.174 10 0.164 3 0.164 cdot 0.122 estimate 0.119 light 0.115 times 0.100 π 0.100 |
In Big Bang cosmology, the observable universe is the region of space bounded by a sphere , centered on the observer, that is small enough that we might observe objects in it, i.e. there has been sufficient time for light emitted by an object to arrive at the observer. Every position has its own observable universe which may or may not overlap with the one centered around the Earth . |
| 2006 |
34819 characters 7 sections 10 paragraphs 4 images 142 internal links 11 external links |
universe 0.551 galaxies 0.367 comoving 0.294 observable 0.232 light 0.177 1080 0.163 emitted 0.156 billion 0.119 quoted 0.112 cosmology 0.108 observer 0.107 matter 0.088 visible 0.086 1032 0.081 r3 0.081 |
The observable universe is a term used in Big Bang cosmology to describe a ball -shaped region of space surrounding the observer that is close enough that we might observe objects in it, i.e. there has been sufficient time for light emitted by an object to arrive at the observer. Every position has its own observable universe which may or may not overlap with the one centered around the Earth. |
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| 2005 |
6125 characters 4 sections 6 paragraphs 0 images 25 internal links 0 external links |
universe 0.468 observable 0.306 cosmology 0.183 bang 0.176 photon 0.156 scattering 0.143 misconception 0.138 irrelevant 0.138 pg 0.138 misconceptions 0.138 light 0.137 billion 0.135 perceive 0.125 unobservable 0.125 causally 0.125 |
The observable Universe is a term used in cosmology to describe a ball -shaped region of space surrounding the Earth that is close enough that we might observe objects in it. Every position has its own observable Universe which may or may not overlap with the generalized one centred around the Earth. |
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| 2003 |
810 characters 0 sections 1 paragraphs 0 images 1 internal links 0 external links |
redirect 1.000 |