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The locations of supernovae in the local stellar and gaseous environment ingalaxies contain important clues to their progenitor stars. Access to thisinformation, however, has been hampered by the limited resolution achieved byground-based observations. High spatial resolution Hubble Space Telescope (HST)images of galaxy fields in which supernovae had been observed can improve thesituation considerably. We have examined the immediate environments of a fewdozen supernovae using archival post-refurbishment HST images. Although ouranalysis is limited due to signal-to-noise ratio and filter bandpassconsiderations, the images allow us for the first time to resolve individualstars in, and to derive detailed color-magnitude diagrams for, severalenvironments. We are able to place more rigorous constraints on the masses ofthese supernovae. A search was made for late-time emission from supernovae inthe archival images, and for the progenitor stars in presupernova images of thehost galaxies. We have detected SN 1986J in NGC 891 and, possibly, SN 1981K inNGC 4258. We have also identified the progenitor of the Type IIn SN 1997bs inNGC 3627. By removing younger resolved stars in the environments of SNe Ia, wecan measure the colors of the unresolved stellar background and attribute thesecolors generally to an older, redder population. HST images ``accidentally''caught the Type Ia SN 1994D in NGC 4526 shortly after its outburst; we measureits brightness. Finally, we add to the statistical inferences that can be madefrom studying the association of SNe with recent star-forming regions.Comment: 20 pages, 29 figures, to appear in A

The Environments of Supernovae in Post-Refurbishment [ITAL]HUBBLE SPACE TELESCOPE[/ITAL] [ITAL]Hubble Space Telescope[/ITAL] Images