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The universe comprises all of existence: all forms of matter and energy, and the structures they form, from subatomic particles to entire galactic filaments. Since the early 20th century, the field of cosmology has established that the universe has been expanding for 13.
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Explore the main themes, entities and connections around Universe. Start with the topic map, then use the sections below for research and deeper semantic analysis.
Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.
High-confidence facts extracted from structured source data. Use them as anchors for further research.
Browse the full topic structure. Each item opens a new analysis centered on that subject.
Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.
See the strongest relationship patterns around the current topic before diving into the raw triples.
Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.
matter energy time density stars model space dark form galaxies earth big known spacetime proposed cosmological billion one first bang
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Universe | Age | 13.787 ± 0.020 billion years | 1.00 | infobox |
| Universe | Average density (with energy) | 9.9×10−27 kg/m3 | 1.00 | infobox |
| Universe | Average temperature | 2.72548 K (−270.4 °C, −454.8 °F) | 1.00 | infobox |
| Universe | Main contents | Ordinary (baryonic) matter (4.9%) Dark matter (26.8%) Dark energy (68.3%) | 1.00 | infobox |
| Universe | Observable diameter | 8.8×1026 m (28.5 Gpc or 93 Gly) | 1.00 | infobox |
| Universe | Shape | Flat with 0.4% error margin | 1.00 | infobox |
| Universe | is a | Big Bang theory | 0.90 | text |
| Universe | is a | name given by most astronomers to the sphere the center of which is the center of the Earth | 0.90 | text |
| the cosmos | instance of | The word universe may also refer to concepts | 0.80 | text |
| the world | instance of | The word universe may also refer to concepts | 0.80 | text |
| and nature | instance of | The word universe may also refer to concepts | 0.80 | text |
| the homogeneity | instance of | The model is based on general relativity and on symmetry assumptions | 0.80 | text |
These clusters group vocabulary that occurs around closely connected concepts in the source material.
Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.