MAST is an archive of data from a variety of astronomical telescopes. Also follow us on Twitter: https://twitter.com/MAST_News Congressional history.
The Space Telescope Science Institute (STScI) was already operating an efficient archive for distribution of the Hubble Space Telescope data in 1997, when the International Ultraviolet Explorer mission ended and NASA began to search for a permanent home for the IUE data archive. The clear synergy between HST and IUE science made it logical to combine the data into a single archive. Soon thereafter
06/12/2026
HLSP Update: PHANGS-CAT has built an integrated dataset for multi-phase, multi-scale studies of star formation. Data Release 5 (DR5) provides HST photometry with improved estimates of age, mass, and reddening, across the full sample of 38 PHANGS-HST spiral galaxies. https://archive.stsci.edu/hlsp/phangs/phangs-cat
06/04/2026
New HLSP: TARS provides systematics-corrected light curves and Lomb-Scargle periodograms for 39 million star-sector combinations (7.5 million unique stars) observed by TESS between Sectors 1 and 96. This dataset was used to measure rotation periods from >1 million stars. https://archive.stsci.edu/hlsp/tars
05/29/2026
HLSP Update: Scylla adds 1.5 million new stellar SED fits and dust maps for 60+ fields across the SMC and LMC. SED fits provide stellar mass, age, distance, metallicities, and dust properties. Parsec-scale dust maps provide 10x higher resolution than existing maps. https://archive.stsci.edu/hlsp/scylla
05/18/2026
New HLSP: SKYSURF combines 143,914 Hubble ACS/WFC, WFC3/UVIS, and WFC3/IR images from 2002-2020 to probe the extragalactic background light (EBL) at an unprecedented scale.
The release includes high‑level science products such as the sky surface brightness measurements from O’Brien et al. 2023 (SKYSURF‑4), the ProFound sky maps from Tompkins et al. 2026 (SKYSURF‑9), and the drizzled mosaics and source catalogs from Carter et al. 2026 (SKYSURF‑10).
https://archive.stsci.edu/hlsp/skysurf
05/18/2026
HLSP Update: QLP calibrated light curves from TESS full frame images for Sector 101 are now available at MAST. This Sector adds 1,801,255 targets derived from 200 second cadence FFIs. https://archive.stsci.edu/hlsp/qlp
05/13/2026
HLSP Update: TESS-SPOC calibrated light curves and target pixel files from TESS full frame images for Sector 84 are now available at MAST. This Sector adds 159,999 targets derived from 200 second cadence FFIs. https://archive.stsci.edu/hlsp/tess-spoc
04/30/2026
HLSP Update: TESS-SPOC calibrated light curves and target pixel files from TESS full frame images for Sector 83 are now available at MAST. This Sector adds 159,997 targets derived from 200 second cadence FFIs. https://archive.stsci.edu/hlsp/tess-spoc
04/24/2026
HLSP Update: QLP calibrated light curves from TESS full frame images for Sector 100 are now available at MAST. This Sector adds 2,049,834 targets derived from 200 second cadence FFIs.
https://archive.stsci.edu/hlsp/qlp
04/22/2026
HLSP Update: OPAL adds HST observations of Jupiter Cycle 32 from December 2025, now available at MAST. archive.stsci.edu/hlsp/opal
04/09/2026
New HLSP: NGC5044-HST analyzes the morphology of ionized gas filaments and dust structures in the central regions of NGC 5044. This dataset enables detailed studies of the spatial relationship between warm ionized gas, dust, and potential sites of recent star formation in this nearby galaxy group. https://archive.stsci.edu/hlsp/ngc5044-hst