Virtual Observatory

The Virtual Observatory is an international effort to make astronomical data interoperable and accessible through standardized services. It lets researchers discover and analyze data from distributed archives using common protocols and formats.

International Virtual Observatory Alliance: An international organization coordinating standards and practices for astronomical interoperability. It coordinates the standards that make the Virtual Observatory work across institutions.
Astronomical Data Archives: Repositories that preserve and provide access to astronomical observations, catalogs, and research products. They supply the distributed data that the Virtual Observatory connects.
Cross-Match (astronomy): The process of identifying records in different astronomical catalogs that correspond to the same celestial source. Common coordinates and query services let researchers match sources across surveys.
Time-Domain Astronomy: The study of astronomical objects and events that change over time. Standardized discovery helps researchers connect transient alerts with archived observations.
Virtual Observatory Query Language: A standardized language for querying astronomical catalog data through web services. It enables structured searches across distributed catalog services.
FITS: A widely used file format for storing and exchanging astronomical data. Common file conventions allow services to exchange images and tables reliably.
Astronomical Image Visualization Metadata: Metadata conventions that let visualization tools display astronomical images consistently. Standard image descriptions make remote observations usable in shared visualization tools.
Multi-Messenger Astronomy: Astronomy combining information carried by light, gravitational waves, neutrinos, or cosmic rays. Interoperable data practices support comparisons across observatories and messengers.
Table Access Protocol: A standard web protocol for querying and retrieving astronomical tables. It provides a common interface to remote catalog databases.
World Coordinate System: A framework for mapping coordinates in data files to positions and measurements in the sky. Shared coordinate conventions make observations from different instruments comparable.

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