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Failing Stars

Failing Stars
The faint red stars in this close-up image are the myriad brown dwarfs that Hubble spied for the first time in the Orion Nebula in visible light. Sometimes called "failed stars," brown dwarfs are cool objects that are too small to be ordinary stars because they cannot sustain nuclear fusion in their cores the way our Sun does.

About the Object

  • R.A. Position
    R.A. PositionRight ascension – analogous to longitude – is one component of an object's position.
    05h 35m 17.0s
  • Dec. Position
    Dec. PositionDeclination – analogous to latitude – is one component of an object's position.
    -5° 23' 27.99"
  • Constellation
    ConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.
    Orion
  • 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.
    The distance to the Orion Nebula is 1,500 light-years (460 parsecs).

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.

    The Hubble image was created from HST data from proposal 10246: M. Robberto (STScI/ESA), C.R. O'Dell (Vanderbilt University), L.A. Hillenbrand (Caltech), M. Simon (SUNY Stony Brook), P. McCullough (STScI), J. Krist (Jet Propulsion Laboratory), F. Palla (Osservatorio Astrofisico di Arcetri), M. Romaniello (ESO – Germany), J. Najita (NOAO/AURA), E.D. Feigelson (The Pennsylvania State University), R. Makidon (STScI), J. Stauffer (Jet Propulsion Laboratory); N. Panagia, I.N. Reid, D.R. Soderblom, and E. Bergeron (STScI); and K.G. Stassun (Vanderbilt University).

    The Hubble data was superimposed onto a ground-based image taken from the 2.2 meter telescope at the European Southern Observatory – La Silla.

  • Instrument
    InstrumentThe science instrument used to produce the data.
    HST>ACS and ESO-La Silla >2.2 meter telescope/WFI
  • Exposure Dates
    Exposure DatesThe date(s) that the telescope made its observations and the total exposure time.
    October 2004 - April 2005 (ACS), and December 11, 2001 (WFI)
  • Filters
    FiltersThe camera filters that were used in the science observations.
    ACS: F435W (B), F555W (V), F658N (Halpha) , F775W (i), and F850LP (z)ESO: BB#B/99_ESO842 B, NB#OIII/8_ESO859 [O III], ESO NB#Halpha/7_ESO856, and ESO NB#SIIr/8_ESO857 [S II]
  • Object Name
    Object NameA name or catalog number that astronomers use to identify an astronomical object.
    Orion Nebula , M42, NGC 1976
  • Object Description
    Object DescriptionThe type of astronomical object.
    Emission Nebula, brown dwarf stars
  • Release Date
    January 11, 2006
  • Science Release
    Hubble Panoramic View of Orion Nebula Reveals Thousands of Stars
  • Credits
    NASA,ESA, M. Robberto (Space Telescope Science Institute/ESA) and the Hubble Space Telescope Orion Treasury Project Team

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Failing Stars
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 mosaic of many separate expposures made by the ACS instrument on the Hubble Space Telescope and the ESO La Silla 2.2 meter telescope using several different filters isolating the light of specific elements or of specific broad wavelength ranges. The color arises by assigning different hues (colors), to each monochromatic image. In this case, the colors are:Blue: ACS F435W (B) + ESO BB#B/99_ESO842 BGreen: ACS F555W (V) + ESO NB#OIII/8_ESO859 [O III]Red-orange: ACS F658N (Halpha) Red: ACS F775W (i) + F850LP (z) + ESO NB#Halpha/7_ESO856 + ESO NB#SIIr/8_ESO857 [S II]

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Details

Last Updated
Mar 14, 2025
Contact
Media

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