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Moving Closer To The Grand Spiral

Date:
August 18, 2005
Source:
European Southern Observatory
Summary:
An international team of astronomers from Chile, Europe and North America is announcing the most accurate distance yet measured to a galaxy beyond our Milky Way's close neighbours. The team used the ISAAC instrument on ESO's 8.2-m VLT Antu telescope to obtain deep images in the near-infrared of three fields in NGC 300 and determine the distance to this spiral galaxy with an unprecedented uncertainty of only three percent.

Location of the three fields in the Sculptor spiral galaxy NGC 300 for which deep imaging in the near-infrared J and K filters was obtained with VLT/ISAAC. The fields contain together 16 Cepheids with periods from 6 to 83 days.
Credit: Image courtesy of European Southern Observatory

An international team of astronomers from Chile, Europe and North America [1] is announcing the most accurate distance yet measured to a galaxy beyond our Milky Way's close neighbours. The distance was determined using the brightness variation of a type of stars known as "Cepheid variables".


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The above story is based on materials provided by European Southern Observatory. Note: Materials may be edited for content and length.


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European Southern Observatory. "Moving Closer To The Grand Spiral." ScienceDaily. ScienceDaily, 18 August 2005. <www.sciencedaily.com/releases/2005/08/050814173016.htm>.
European Southern Observatory. (2005, August 18). Moving Closer To The Grand Spiral. ScienceDaily. Retrieved April 24, 2014 from www.sciencedaily.com/releases/2005/08/050814173016.htm
European Southern Observatory. "Moving Closer To The Grand Spiral." ScienceDaily. www.sciencedaily.com/releases/2005/08/050814173016.htm (accessed April 24, 2014).

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