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Links
Atomic clock
Info on objects
SOHO data - current sun images
SolarMonitor - further SOHO-images
Simbad - database, see also How to work with the SIMBAD: Query by criteria
calsky.com - The most complete online-calculator for atronomical observations
Planetarium
Atomic data
Atomic Data for Resonance Absorption Lines. III. Wavelengths Longward of the Lyman Limit for the Elements Hydrogen to Gallium (Data Table)
Astronomical catalogs
| Site | Comments |
|---|---|
| Wikipedia | List of astronomical catalogues |
| New General Catalogue (NGC) | Catalog of nebula, star clusters, and galaxies |
| Messier catalog | List of 110 astronomical objects, mainly galaxies, star clusters, and nebula |
| Hipparcos catalog | High-precision star catalogue |
Manufacturer
… more to come
More interesting links
Astronomy Picture of the Day - Every day an interesting astrophysical image
Hipparcos - Astrometric space mission
VizieR - The most significant astronomical database
Staralt - Tool to determine the observability of objects
exoplanet.eu - Catalog of extrasolar planets
Gazetteer of Planetary Nomenclature - Information about the objects of our solar system