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Andromeda Galaxy (M31) Mosaic

Andromeda Galaxy (M31) Mosaic

About the Object

  • R.A. Position
    R.A. PositionRight ascension – analogous to longitude – is one component of an object's position.
    00h 42m
  • Dec. Position
    Dec. PositionDeclination – analogous to latitude – is one component of an object's position.
    +41° 15'
  • Constellation
    ConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.
    Andromeda
  • Distance
    DistanceThe physical distance from Earth to the astronomical object. Distances within our solar system are usually measured in Astronomical Units (AU). Distances between stars are usually measured in light-years. Interstellar distances can also be measured in parsecs.
    2.5 million light-years (0.8 megaparsecs)

About the Data

  • Data Description
    Data DescriptionProposal: A description of the observations, their scientific justification, and the links to the data available in the science archive.
    Science Team: The astronomers who planned the observations and analyzed the data. "PI" refers to the Principal Investigator.
    Data of M31 were obtained from the HST PHAT Treasury Proposals: P.I. J. Dalcanton (University of Washington) et al. 12055, 12056, 12057, 12058, 12059, 12076, 12070, 12071, 12072, 12073, 12074, 12075, 12114, 12105, 12106, 12107, 12108, 12109, 12111, 12112, 12113, 12114, and 12115.
  • Instrument
    InstrumentThe science instrument used to produce the data.
    HST>ACS
  • Exposure Dates
    Exposure DatesThe date(s) that the telescope made its observations and the total exposure time.
    July 2010 - October 2013, Total Exposure Time: 394 hours (16.1 days)
  • Filters
    FiltersThe camera filters that were used in the science observations.
    F475W (g) and F814W (I)
  • Object Name
    Object NameA name or catalog number that astronomers use to identify an astronomical object.
    M31, Andromeda Galaxy
  • Object Description
    Object DescriptionThe type of astronomical object.
    Spiral Galaxy
  • Release Date
    September 3, 2015
  • Science Release
    Hubble Survey Unlocks Clues to Star Birth in Neighboring Galaxy
  • Credits
    NASA, ESA, J. Dalcanton, B.F. Williams, L.C. Johnson (University of Washington), the PHAT team, and R. Gendler

Downloads

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  • 1280 × 457
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Andromeda Galaxy (M31) Mosaic
Color Info
Color InfoA brief description of the methods used to convert telescope data into the color image being presented.

This image is a composite of separate exposures acquired by the ACS instrument on the Hubble Space Telescope. Several filters were used to sample broad wavelength ranges. The color results from assigning different hues (colors) to each monochromatic (grayscale) image associated with an individual filter. In this case, the assigned colors are: Blue: F475W (g) Yellow: F814W (I)

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Details

Last Updated
Feb 17, 2025
Contact
Media

Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, MD
claire.andreoli@nasa.gov