Pro

ESA Sky

ESA portal to visualise and download ESA missions and other public astronomical data from space-based missions.

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ESO Archive Science Portal

Browse and access the ESO processed data.

Pro

Transient Name Server (TNS)

IAU official mechanism to report new astronomical transients.

Pro

ALeRCE ZTF Explorer

Tool to explore the astronomical objects recovered from the ZTF alert stream.

Pro

MaserDB

Database of astrophysical masers.

Pro

ASAS-SN

Sky Patrol Photometry Database.

Pro

Gaia Photometric Science Alerts

Pro

JAFAR

Just Annotate Features for Astronomical Results: online tool for manually outlining features in astronomical images to support scientific classification and analysis.

Pro

CLAXSON

Classification of X-ray Sources for Novices, a citizen science project for XMM data.

Pro

HyperLeda

Database for physics of galaxies.

Pro

Lasair

A UK Alert Stream Broker for ZTF and LSST.

Pro

MASTER-SAAO

Mobile Astronomical System of TElescope-Robots, located in South Africa.

Pro

NOT

Nordic Optical Telescope

Pro

ESO p2

Tool for Phase 2 Observing Preparation

Pro

MASTER-OAFA

Mobile Astronomical System of TElescope-Robots, located in Argentina.

Pro

ExoClock

A project to monitor the ephemerides of transiting exoplanets by the ARIEL Ephemerides Working Group.

Pro

ALMA Science Archive at NRAO

Pro

ERC Lucky Star project

Predictions of stellar occultations by TNOs, Centaurs and Trojans

Pro

CADC

Canadian Astronomy Data Centre

Pro

CADE

Analysis Center for Extended Data

Pro

BHTOM

Black Hole Target Observation Manager, a state-of-the-art web server designed to coordinate a network of telescopes, manage astronomical observations, and process the data obtained from these observations.

Pro

ALMA Science Archive at ESO

Pro

SAO RAS

Special Astrophysical Observatory of the Russian Academy of Sciences, largest Russian astronomical center for ground-based observations of objects in the Universe.

Pro

CASSIS

Combined atlas of Sources with Spitzer IRS Spectra

Pro

WISeREP

The Weizmann Interactive Supernova Data Repository (WISeREP): archive of SN spectra and photometry.

Pro

XTgrid sandbox

XTgrid based online spectral analysis with Tlusty models.

Pro

Find Exoplanets Transits

This tool calculates observability of the known transiting exoplanets or TESS Objects of Interest (TOIs) from a given location at a given time.

Pro

eROSITA-DE Data

Pro

ANTARES

Real-time Alert Broker for all alerts from ZTF survey.

Pro

RCSED

Reference Catalog of galaxy SEDs

Pro

TASC

TESS Asteroseismic Science Consortium

Pro

Fink

Fink Science portal

Pro

ALMA Science Archive at NAO

Pro

INAF REM Data Archive

Pro

Firmamento

A Multimessenger Astronomy Tool for Citizen and Professional Scientists

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NODSV

New Online Database of Symbiotic Variables

Pro

Tomo-e Gozen

Optical wide-field video-survey with a mosaic CMOS camera on the Kiso Schmidt telescope, the University of Tokyo.

Pro

TELAMON

The TELAMON program is using the Effelsberg 100-m telescope to monitor the radio spectra of active galactic nuclei (AGN) under scrutiny in astroparticle physics.

Pro

The Hot Subdwarf catalog

Pro

Treasure Map

The Treasure Map is designed to help coordinate electromagnetic followup of gravitational-wave (GW) events.

Pro

Blinkverse

A Database of Fast Radio Bursts

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BlackCAT

A Catalog of Stellar-Mass Black Holes in X-ray Binaries

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YSOC

The Young Stellar Object Corral

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JUDO2 Portal

A virtual celestial globe that displays observation images, catalog information on the celestial sphere for satellites Hitomi, Suzaku, ASCA, MAXI, AKARI.

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SNEx, the Supernova Exchange

The Supernova Exchange is an interface for viewing and sharing observational data of supernovae, and for requesting and managing observations with the LCO network.

Pro

UCC

The Unified Cluster Catalogue

Pro

SuperWASP VeSPA

VeSPA: The SuperWASP Variable Star Photometry Archive

Pro

DREAMS monitoring

Monitoring page for the Dynamic REd All-sky Monitoring Survey, a near-infrared fully automated all-sky survey located at the Australian National University’s Siding Spring Observatory.

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CSIRO Data Portal

CASDA Skymap Search in CSIRO Data Access Portal

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Fermi followup of IceCube

Fermi-LAT follow-up of IceCube realtime alerts

Pro

Planet Place Names

Pro

SIMPLE database

The vision of the SIMPLE project is to create a collaborative database of low-mass stars, brown dwarfs, and directly imaged exoplanets: a simple archive of complex objects.

Pro/CDS

SIMBAD

Database of objects studied in scientific articles.

Pro/CDS

VizieR

Most complete library of published astronomical catalogues - tables and associated data - with verified and enriched data, accessible via multiple interfaces.

Pro/CDS

CDS Portal

Access all CDS services from a single entry point.

Pro/CDS

VizieR associated data

Am

Astrography Camera Frame Simulator

Am

DeepskyLog

Extended, comprehensive and free database for deepsky objects, developed by the Deepsky section of the Astronomical Society of Belgium

Am

Clear Skies

Am

Stelle Doppie

Search engine to the Washington Double Star Catalog (WDS).

Am

Airmass

Tool for planning astronomical observations.

Am

Arcsecond.io

The astronomical observations platform. For astronomers and observatories.

Am

Astro Mosaic

A tool for planning telescope observations.

Am

Occult Watcher

Am

Finder Charts Tool

Simple tool for generating pretty, shareable and interactive Finder Charts using Aladin Lite.

Am

Simulateur Astrophotographie

Am

CzSkY

The mission of this website is to build an active community of space observers and find new ways to inspire them and make their hobby even more fun.

Pro/Am

The Webb Deep-Sky Society

An international society of amateur and professional astronomers specialising in the observation of double stars and 'deep sky' objects founded in 1967.

Pro/Am

GEOS RR Lyr database

Help observations and studies on RR Lyr stars.

Pro/Am

CORA

Collaborative Occultation Resources and Archive

EPO

ESA Hubble

ESA outreach page for the Hubble Space Telescope (HST).

EPO

ESA Webb

ESA outreach page for the James Webb Space Telescope (JWST).

EPO

Space Telescope Live

Explore official, up-to-date information on current, past, and upcoming investigations by NASA's HST and JWST.

EPO

Rubin SkyViewer app

SkyViewer app offers both guided and free-form exploration of select Rubin images, as well as interactive sonification.

EPO

NOIRLab Public Outreach page for images

EPO

eSky

The electronic Sky