Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

3C 273

3C 273 is a quasar located at the center of a giant elliptical galaxy in the constellation of Virgo. It was the first quasar ever to be identified and is the visually brightest quasar in the sky as seen from the Earth, with an apparent visual magnitude of 12.9, outshining by more than 16 times the entire galaxy that hosts it. The derived distance to this…

History & Art

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around 3C 273. Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Apparent magnitude (V)
12.9
Constellation
Virgo
Declination
+02° 03′ 09″
Distance
2.443 Gly (749 Mpc) (luminosity distance) 1.80+0.32 −0.28 Gly (552+97 −79 Mpc) (parallax distance)
Notable features
optically brightest quasar, first spectrum of a quasar
Redshift
0.158339 ± 0.000067

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Observation

Properties

History

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

3C 273

Nodes71
Edges70
Triples62
Avg. degree1.97
Density0.028169
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

3C 273

Top relations

related to External links · 21
3C 273 → Articles, Astrophoto, Database, Detailed CCD, DSS2, ESA, GALEX, Hydrogen, INTEGRAL Science Data Centre, IRAS, MAP, ORG SDSS, Quasar, Redshift MeasurementNightSkyInfo, SDSS, Season AAVSO3C, Sky Map, Spring, Variable Star Of The, WikiSky
related to history · 17
3C 273 → After, Also, AU CVn, Bev Oke, BL Lac, Com, Cyril Hazard, However, In, Its, Maarten Schmidt, Nature, Parkes Radio Telescope, Prior, Radio Sources, The, Third Cambridge Catalog
related to Observation · 11
3C 273 → Due, Earth, Fifth Fundamental Catalog, FK5, Given, ICRS, International Celestial Reference System, July, March, Situated, Virgo
is a · 3
3C 273 → most distant celestial object average amateur astronomers are likely to see through their telescopes, quasar located at the center of a giant elliptical galaxy in the constellation of Virgo, radio-loud quasar
related to Host galaxy · 2
3C 273 → E4, The
Apparent magnitude (V) · 1
3C 273 → 12.9
Constellation · 1
3C 273 → Virgo
Declination · 1
3C 273 → +02° 03′ 09″
Distance · 1
3C 273 → 2.443 Gly (749 Mpc) (luminosity distance) 1.80+0.32 −0.28 Gly (552+97 −79 Mpc) (parallax distance)
Notable features · 1
3C 273 → optically brightest quasar, first spectrum of a quasar

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

3c quasar 273 jet galaxy magnitude distance first radio apparent earth object redshift luminosity optical also virgo telescope sky central

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
3C 273Apparent magnitude (V)12.91.00infobox
3C 273ConstellationVirgo1.00infobox
3C 273Declination+02° 03′ 09″1.00infobox
3C 273Distance2.443 Gly (749 Mpc) (luminosity distance) 1.80+0.32 −0.28 Gly (552+97 −79 Mpc) (parallax distance)1.00infobox
3C 273Notable featuresoptically brightest quasar, first spectrum of a quasar1.00infobox
3C 273Redshift0.158339 ± 0.0000671.00infobox
3C 273Right ascension12h 29m 06.7s1.00infobox
3C 273TypeBlazar; Sy11.00infobox
3C 273is aquasar located at the center of a giant elliptical galaxy in the constellation of Virgo0.90text
3C 273is amost distant celestial object average amateur astronomers are likely to see through their telescopes0.90text
3C 273is aradio-loud quasar0.90text
3C 273related to External linksDatabase0.60section

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.