Linked from

The 39 pages that link to Very Long Baseline Interferometry, each with the reason it gives.

• GeodesyRelated: It measures Earth’s orientation and links terrestrial coordinates to distant celestial sources.

• AstrometryRelated: It measures the radio-source positions used to realize the modern celestial reference frame.

• Atomic clockRelated: Atomic clocks synchronize observatories so distant radio signals can be compared.

• TriangulationRelated: It uses angular observations across known baselines to locate celestial sources and stations.

• SecondRelated: Its measurements require precise timing and synchronization at separate observatories.

• Event Horizon TelescopeNarrower topic: It is the technique that lets the array resolve black-hole-scale structures.

• Aperture synthesisBroader topic: Its exceptionally long baselines provide extremely fine angular resolution.

• Radio interferometryBroader topic: It pushes radio angular resolution to the scale set by Earth-sized baselines.

• Deep Space NetworkCompared with: It uses geographically separated antennas for joint observations, rather than primarily linking Earth with spacecraft.

• Very Large ArrayCompared with: It uses a related method but links independent observatories over far greater distances.

• Hydrogen maserRelated: Hydrogen masers synchronize observatories whose signals are later combined.

• Universal TimeRelated: It supplies highly accurate measurements of Earth’s rotation used to determine UT1.

• BlazarRelated: It resolves compact jet structure and motion in nearby blazars.

• Earth orientation parametersRelated: Quasar observations provide precise estimates of celestial pole offsets and UT1.

• Optical atomic clockCompared with: Unlike astronomical time comparison, clock-based geodesy uses frequency differences to probe gravitational potential.

• GaiaCompared with: It provides precise positions for radio sources through a method and wavelength regime distinct from Gaia’s.

• Satellite geodesyRelated: Its precise Earth-orientation measurements provide a reference for satellite-derived coordinate systems.

• International Atomic TimeRelated: Its precise timing and geodetic measurements rely on stable international time references.

• Polar motionRelated: Its observations help determine Earth’s orientation and polar motion.

• Very Long Baseline ArrayNarrower topic: The VLBA is a dedicated observatory built to use this technique.

• International Celestial Reference SystemRelated: It measures radio-source directions with the precision needed to realize the ICRS axes.

• Brightness temperatureRelated: Resolved radio sources can have brightness temperatures that constrain their emitting regions and energy processes.

• Messier 87Narrower topic: The Event Horizon Telescope used this method to resolve structures near M87*.

• National Radio Astronomy ObservatoryRelated: NRAO's VLBA helped make high-resolution, routine VLBI a major astronomical capability.

• Shapiro time delayRelated: Solar-gravity deflection and timing measurements in radio signals connect this technique to relativistic light propagation.

• Square Kilometre ArrayCompared with: Unlike this technique's primary focus on extreme resolution, the SKA emphasizes sensitivity and survey capability.

• 3C 273Related: VLBI resolves compact structures within 3C 273's radio core and jet.

• Reinhard GenzelCompared with: It imaged Sagittarius A* directly, complementing Genzel’s stellar-orbit evidence.

• Astrophysical maserRelated: It resolves maser spots and measures their positions and motions with high precision.

• Jodrell Bank ObservatoryRelated: The observatory joins global networks to create exceptionally sharp radio images.

• Atacama Large Millimeter/submillimeter ArrayCompared with: Unlike VLBI, ALMA usually combines signals in real time across antennas at one site.

• MegamaserRelated: It resolves individual maser spots and measures their positions and motions.

• Sagittarius A*Related: It resolves structure on scales comparable to the black hole’s shadow.

• Scutum–Centaurus ArmRelated: It provides parallax distances that can place star-forming regions within spiral arms.

• Astronomical nutationRelated: It measures celestial-source directions precisely enough to constrain nutation.

• Astronomical radio sourceRelated: It resolves compact radio sources, including jets near black holes.

• Effelsberg 100-metre Radio TelescopeRelated: Effelsberg joins international arrays for observations with exceptionally high angular resolution.

• Expanding EarthRelated: Geodetic measurements using this technique constrain any present-day increase in Earth's radius.

• Norman Ramsey Jr.Related: Hydrogen masers provide the stable timing references needed to combine distant telescope signals.