File:Hubble stretches the stellar tape measure ten times further.jpg

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English: This illustration shows the precision stellar distance measurement from the NASA/ESA Hubble Space Telescope and how it has been extended 10 times further into our Milky Way galaxy than ever before. This greatly expands the volume of space accessible for refining the cosmic tape measure needed for measuring the size of the Universe. This type of measurement is based on trigonometric parallax, a geometric method commonly used by astronomers.
Italiano: Questa illustrazione mostra la precisione di misurazione stellare a distanza del telescopio spaziale Hubble, 10 volte meglio che in precedenza. Questo amplifica notevolmente il volume dello spazio accessibile per raffinare la misura del nastro cosmico necessario per misurare la dimensione dell'Universo. Questo tipo di misurazione si basa sulla parallasse trigonometrica, un metodo geometrico comunemente utilizzato dagli astronomi.
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来源 http://www.spacetelescope.org/images/opo1423a/
作者 Illustration Credit: NASA, ESA, and A. Feild (STScI)Science Credit: NASA, ESA, A. Riess (JHU/STScI), S. Casertano (STScI/JHU), J. Anderson and J. MacKenty (STScI), and A. Filippenko (University of California, Berkeley)

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