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The Abundance of Heavy Elements in Interstellar Gas

Cardelli, Jason A.

The Goddard high-resolution spectrograph aboard the Hubble Space Telescope has been used to produce interstellar abundance measures of gallium, germanium, arsenic, krypton, tin, thallium, and lead, the heaviest elements detected in interstellar gas. These heavy elements arise from stellar nuclear processes (slow- and rapid-process neutron capture)…

Hubble Space Telescope Observations of Comet P/Shoemaker-Levy 9 (1993e)

Feldman, P. D.; A'Hearn, M. F.; Weaver, H. A. +16 more

The Hubble Space Telescope observed the fragmented comet P/Shoemaker-Levy 9 (1993e) (P indicates that it is a periodic comet) on 1 July 1993. Approximately 20 individual nuclei and their comae were observed in images taken with the Planetary Camera. After subtraction of the comae light, the 11 brightest nuclei have magnitudes between ~23.7 and 24.…

A Remarkable Auroral Event on Jupiter Observed in the Ultraviolet with the Hubble Space Telescope

Paresce, F.; Waite, J. H.; Grodent, D. +7 more

Two sets of ultraviolet images of the Jovian north aurora were obtained with the Faint Object Camera on board the Hubble Space Telescope. The first series shows an intense discrete arc in near corotation with the planet. The maximum apparent molecular hydrogen emission rate corresponds to an electron precipitation of ~1 watt per square meter, whic…

Seeing the Nuclei of Active Galaxies

Kinney, Anne L.

The Case of the Blue Stragglers

Bailyn, Charles