Credit & Copyright: AAVSO
Explanation:
Humanity's understanding of the relative brightness and variability of stars
was revolutionized by the work of Henrietta Swan Leavitt (1868-1921).
Working at
Harvard College Observatory, Leavitt precisely
calibrated the photographic magnitudes of 47 stars to which all other
stars could be compared.
Leavitt discovered and cataloged over 1500
variable stars
in the nearby
Magellanic Clouds.
From this catalog, Leavitt discovered that brighter
Cepheid variable stars
take longer to vary, a fact used today to calibrate the
distance scale of our universe.
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Январь Февраль Март Апрель Май Июнь Июль Август Сентябрь Октябрь Ноябрь Декабрь |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Публикации с ключевыми словами:
персоналии - scientist - Henreitta Leavitt - Генриетта Левитт - star
Публикации со словами: персоналии - scientist - Henreitta Leavitt - Генриетта Левитт - star | |
См. также:
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