Acquisition Source
Jet Propulsion Laboratory
Document Type
Reprint (Version printed in journal)
Date Acquired
August 23, 2013
Publication Date
September 1, 1998
Publication Information
Publication: Astrophysical Journal
Distribution Limits
Public
Keywords
cepheid variable stars berred spiral galaxy NGC 4548 Virgo cluster Hubble Spacecepheidshubble constant galaxies individual (NGC4548) distances clusters(Virgo) starsTelescope (HST) extragalactic distance scale wide field and planetary camera 2