In message , Andrew Yee
writes
McDonald Observatory
University of Texas

Contact:
Rebecca A. Johnson
ph: 512-475-6763 fax: 512-471-5060


9 December 2003

Astronomers Re-measure the Universe with Hubble Space Telescope

One of the lower rungs is knowledge of the distance to the Large
Magellenic Cloud (LMC) -- one of the satellite galaxies of the Milky
Way. Astronomers' knowledge of the LMC's distance is based in large
measure on Cepheids inside that galaxy. The problem is, those Cepheids
are not made up of the same stuff as the ones in our galaxy. So
astronomers aren't sure if the P-L relationship really works right on them.

If Cepheids in the LMC aren't the same as the ones in our galaxy, is
there any reason to think that Cepheids in galaxies in the Virgo cluster
are ???
--
Rabbit arithmetic - 1 plus 1 equals 10
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