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Chandra Image of M101

Chandra Image of M101
Chandra's image of Messier 101, taken in X-ray light, shows the high-energy features of this spiral galaxy. X-rays are generally created in violent and/or high-temperature events. The white dots are X-ray sources that include the remains of exploded stars as well as material colliding at extreme speeds around black holes. The pink and blue colors are emission from million-degree gas and from clusters of massive stars. The pink emission indicates lower-energy X-rays and the blue higher-energy X-rays. One reason astronomers study Messier 101's X-rays is to better understand how black holes grow in spiral galaxies.

About the Object

  • R.A. Position
    R.A. PositionRight ascension – analogous to longitude – is one component of an object's position.
    14h 03m 13s
  • Dec. Position
    Dec. PositionDeclination – analogous to latitude – is one component of an object's position.
    +54° 20' 53"
  • Constellation
    ConstellationOne of 88 recognized regions of the celestial sphere in which the object appears.
    Ursa Major
  • 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.
    21.8 million light-years (6.7 megaparsecs)
  • Dimensions
    DimensionsThe physical size of the object or the apparent angle it subtends on the sky.
    This image is 18 arcminutes (114,000 light-years or 35,000 parsecs) wide.

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 science team was led by K. Kuntz (Johns Hopkins University).
  • Instrument
    InstrumentThe science instrument used to produce the data.
    CXO>ACIS
  • Exposure Dates
    Exposure DatesThe date(s) that the telescope made its observations and the total exposure time.
    March 2000 - January 2005
  • Filters
    FiltersThe camera filters that were used in the science observations.
    0.45 - 1.00 keV and 1.00 - 2.00 keV
  • Object Name
    Object NameA name or catalog number that astronomers use to identify an astronomical object.
    M101, NGC 4547, The Pinwheel Galaxy
  • Object Description
    Object DescriptionThe type of astronomical object.
    Face-on Spiral Galaxy
  • Release Date
    February 10, 2009
  • Science Release
    NASA’s Great Observatories Celebrate the International Year of Astronomy with a National Unveiling of Spectacular Images
  • Credits
    NASA, CXC, and K. Kuntz (JHU)

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Chandra Image of M101
Color Info
Color InfoA brief description of the methods used to convert telescope data into the color image being presented.

Pink: 0.45 - 1.00 keV Blue: 1.00 - 2.00 keV

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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