CosmoSim provides results from cosmological simulations, including MultiDark and Bolshoi projects and galaxy catalog data.
APPLAUSE
APPLAUSE archives historical photographic plates and related image materials for research and discovery.
About APPLAUSE
APPLAUSE is an online archive of historical astronomical photographic plates from German observatories and other collections. It provides digitized plates, plate envelopes, observation logbooks, and related metadata for research. Data Release 4 includes material from 27 plate archives in Hamburg, Bamberg, Potsdam, Tautenburg, Tartu and Vatican Observatory.
You can browse sample images in the historical sky image gallery and viewer, and search the database through a query interface. The interface supports SQL queries and search forms, and can be used as a guest without signing in. Registered users can access processed plate data, including scans, exposures, astrometric solutions, photometric calibration, and extracted source detections with light curves.
The site suits researchers and students interested in long-term changes in stars and historical sky observations. It is also useful for anyone working with open astronomical datasets, logbook records, and catalog-matched source data.
Key features
- Search digitized photographic plates via SQL query interface
- View historical sky images in gallery and viewer
- Access scans of plate envelopes and logbooks
- Access astrometric solutions and photometric calibration data
- Extract light curves from calibrated source detections
Best for: Researchers and students studying historical sky observations and long-term stellar variability benefit most.
Good for
- Combines plate scans, metadata, logbooks and source catalogs
- Query interface available to guest users without sign-in
- Covers plates from 1893 to 1998 from multiple observatories
Watch out for
- Only includes plate data processed so far
APPLAUSE at a glance
- Website
- plate-archive.org/applause
- Category
- Research & Data › Open Data & Datasets
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
APPLAUSE alternatives
Tools and sites you could use instead, ranked by how closely they match.
The MultiDark Database provides results from cosmological simulations and lets users query its records with SQL.
CARS shares data from the first release of the Close AGN Reference Survey, a spatial survey of active galaxies.
Penn State Data Commons supports data sharing, discovery, and archiving, with tools to find data and share research datasets.
IEDA connects geoscience data systems for archiving, publishing, discovery, access, and visualization of research data.
The Czech Ministry of Finance open data portal includes records, guides, and analysis related to public spending and invoices.
Popular in Open Data & Datasets
Well-known listings from the same topic.
data.worlddata.worldNASA APIapi.nasa.govdata.meudon.frdata.meudon.frESS-DIVEess-dive.lbl.govState of Hawaiidata.hawaii.govPathway Commonspathwaycommons.org
APPLAUSE FAQ
What is APPLAUSE?
APPLAUSE is an archive of digitized astronomical photographic plates and related materials. It includes scans, metadata, logbooks, and source data extracted from the images.
Do I need an account to search APPLAUSE?
No. The query interface can be used as a guest user without signing in. A user account is available through the registration form.
What is in APPLAUSE Data Release 4?
DR4 contains 125473 scans of 97703 photographic plates from 27 archives, with metadata for 94090 plates. It also includes logbook images, astrometric solutions, photometric calibration, and 4.486 billion extracted source detections.
Is something wrong or out of date?
Tell us and an editor will check it.
Own this website?
Claim this listing
Claim the listing and suggest updates yourself. An editor checks every claim first.