Free astronomy data

Name: JWST and Hubble targets this week (STScI)
Creator: STScI
License: https://creativecommons.org/publicdomain/zero/1.0/

The catalogues behind the map, free to download as CSV (spreadsheets, Python, R) or VOTable (TOPCAT, Aladin, Astropy), each with its units, its source and how to cite it. A part of the sky only? Use Download data on the map for the area in view, or the free JSON API.

Pulsars (ATNF Pulsar Catalogue)

4,503 rows

Every known radio pulsar from the ATNF Pulsar Catalogue: about 4,500 spinning neutron stars with their position, rotation period and its slow-down, dispersion measure, distance, surface magnetic field, characteristic age, binary orbit and radio brightness.

CSV VOTable Source

Columns: jname, bname, ra [deg], dec [deg], period [s], pdot [s/s], dm [pc/cm3], dist [kpc], b_surf [G], age [yr], pb [d], s1400 [mJy], types, assoc
Cite: Manchester, R. N., Hobbs, G. B., Teoh, A. & Hobbs, M. 2005, AJ, 129, 1993 (ATNF Pulsar Catalogue, https://www.atnf.csiro.au/research/pulsar/psrcat/)
Terms: Free to use with the citation above.
Updated: 27 Oct 2026

Galaxies, clusters and nebulae (OpenNGC)

13,375 rows

Galaxies, star clusters and nebulae of the NGC and IC catalogues, as cleaned and kept up to date by OpenNGC: position, type, size, brightness, Hubble type, redshift, Messier number and common names.

CSV VOTable Source

Columns: name, type, ra [deg], dec [deg], constellation, maj_ax [arcmin], min_ax [arcmin], v_mag [mag], b_mag [mag], hubble, redshift, messier, common_names
Cite: OpenNGC, Mattia Verga, https://github.com/mattiaverga/OpenNGC (CC BY-SA 4.0)
Terms: CC BY-SA 4.0: share alike, with attribution. Licence
Updated: 28 Oct 2026

Exoplanets (NASA Exoplanet Archive)

6,451 rows

Every confirmed planet around another star, from the NASA Exoplanet Archive: host star, position, distance, size, mass, orbit, temperature and discovery, with this site's habitable-zone verdict and probability-of-life score.

CSV VOTable Source

Columns: name, host, ra [deg], dec [deg], dist [pc], radius [Rearth], mass [Mearth], period [d], sma [AU], eq_temp [K], insolation, method, disc_year [yr], habitable_zone, life_score
Cite: This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program (Planetary Systems Composite Parameters, doi:10.26133/NEA13)
Terms: Free to use with the acknowledgement above. Licence
Updated: 30 Oct 2026

Supernova candidates (ALeRCE / ZTF)

274 rows

Recent supernova candidates found by the Zwicky Transient Facility and classified by the ALeRCE broker: position, first detection, brightness and the machine classification with its confidence.

CSV VOTable Source

Columns: oid, class, probability, ra [deg], dec [deg], first_detected, last_detected, detections
Cite: Förster, F. et al. 2021, AJ, 161, 242 (ALeRCE); Bellm, E. C. et al. 2019, PASP, 131, 018002 (ZTF)
Terms: Free to use with the citations above.
Updated: 12 Nov 2026

Gravitational-wave events (LIGO/Virgo/KAGRA)

40 rows

Gravitational-wave events published by LIGO, Virgo and KAGRA: merger type probabilities, false alarm rate, distance and the sky area of each event.

CSV VOTable Source

Columns: superevent, time, far [Hz], group, ra [deg], dec [deg], area90 [deg2], distance [Mpc], distance_err [Mpc]
Cite: LIGO Scientific, Virgo and KAGRA Collaborations, public alerts (GraceDB, https://gracedb.ligo.org/)
Terms: Public alerts, free to use with attribution.
Updated: 27 Oct 2026

Gamma-ray bursts (Swift-XRT positions)

151 rows

Gamma-ray bursts detected by NASA's Swift observatory, with the X-ray telescope positions from the UK Swift Science Data Centre.

CSV VOTable Source

Columns: name, date, ra [deg], dec [deg], error [arcsec], position_type
Cite: Evans, P. A. et al. 2009, MNRAS, 397, 1177 (Swift-XRT positions, UK Swift Science Data Centre)
Terms: Free to use with the citation above.
Updated: 27 Oct 2026

Neutrino alerts (IceCube Gold and Bronze)

632 rows

High-energy neutrino track alerts from the IceCube Neutrino Observatory at the South Pole (Gold and Bronze): position with its error circle, energy, signalness and false alarm rate.

CSV VOTable Source

Columns: name, event, time, stream, ra [deg], dec [deg], error90 [arcmin], error50 [arcmin], energy [TeV], signalness, far [1/yr]
Cite: IceCube Collaboration, Gold and Bronze track alerts (Blaufuss, E. et al. 2019, PoS(ICRC2019)1021), via NASA GCN
Terms: Public alerts, free to use with attribution.
Updated: 12 Nov 2026

Fast radio bursts (CHIME/FRB Catalogue 1)

536 rows

Fast radio bursts from the first CHIME/FRB catalogue: 536 millisecond radio flashes with position, dispersion measure, fluence, width and scattering, repeating sources marked.

CSV VOTable Source

Columns: tns_name, repeater, ra [deg], dec [deg], ra_err [deg], dec_err [deg], time, dm [pc/cm3], dm_excess [pc/cm3], snr, fluence [Jy.ms], width [ms], scattering [ms]
Cite: CHIME/FRB Collaboration 2021, ApJS, 257, 59 (The First CHIME/FRB Fast Radio Burst Catalog)
Terms: Free to use with the citation above. Licence
Updated: 8 Nov 2026

JWST and Hubble targets this week (STScI)

127 rows

What the James Webb and Hubble space telescopes observed in the last days and are scheduled to observe, from the MAST archive and JWST's published schedules: target, position, instrument and science programme.

CSV VOTable Source

Columns: telescope, status, target, programme, title, instrument, ra [deg], dec [deg], start, seconds [s]
Cite: Mikulski Archive for Space Telescopes (MAST), Space Telescope Science Institute; JWST observing schedules (STScI)
Terms: Public metadata; programme data may be in its exclusive-access period. Licence
Updated: 30 Oct 2026