Photo release STScI-PR94-17; This is the clearest view yet of the distant planet Pluto and its moon, Charon, as revealed by NASA's Hubble Space Telescope (HST). Photo release STScI-PR94-18; This picture is a composite of a black and white near infrared image of Jupiter and its satellite Io and a color image of Io at shorter wavelengths taken at almost the same time on March 5, 1994. Photo release STScI-PR94-21; This is a composite HST image taken in visible light showing the temporal evolution of the brightest region of comet P/Shoemaker-Levy 9. Photo release STScI-PR94-22; This striking NASA Hubble Space Telescope picture shows three rings of glowing gas encircling the site of supernova 1987A, a star which exploded in February 1987. Press release STScI-PR94-22 discusses Hubble's images of a mysterious mirror- imaged pair of glowing gas rings encircling the site of the stellar explosion supernova 1987A. Photo release STScI-PR94-23a; A NASA Hubble Space Telescope image of a spiral-shaped disk of hot gas in the core of active galaxy M87. Photo release STScI-PR94-23b; A schematic diagram of velocity measurements of a rotating disk of hot gas in the core of active galaxy M87. Press release STScI-PR94-23 discusses seemingly conclusive evidence for a massive black hole in the center of the giant elliptical galaxy M87, located 50 million light years away in the constellation Virgo.