RR Lyrae variable

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41	AAVSO: XZ Cygni, August 2002 Variable Star Of The Month Variable Star Of The Month Add to Reading List Source URL: www.aavso.org Language: English - Date: 2010-09-27 11:24:45 Space Universe Astrometry RR Lyrae variables Cepheid variables Blazhko effect RR Lyrae Globular cluster Sergey Blazhko Astronomy Standard candles Variable stars
42	PDF Document Add to Reading List Source URL: www.nasonline.org Language: English - Date: 2011-10-28 17:43:34 Harlow Shapley Harvard College Observatory Globular cluster Star RR Lyrae variable Variable star Henrietta Swan Leavitt Astronomy Space Solon Irving Bailey
43	PDF Document Add to Reading List Source URL: www.aavso.org Language: English - Date: 2010-09-27 11:24:45 Astrometry Physical cosmology Space Cepheid variable W Virginis variable Type II Cepheid Cosmic distance ladder RR Lyrae variable Large Magellanic Cloud Astronomy Variable stars Standard candles
44	PDF Document Add to Reading List Source URL: arxiv.org Language: English - Date: 2011-06-09 20:54:58 Star types Standard candles RR Lyrae variables Lyra constellation Star clusters RR Lyrae Variable star Blazhko effect Cosmic distance ladder Astronomy Space Universe