166,328 research outputs found

    The effect of the impact of comet Shoemaker Levy‐9 on Jupiter's aurorae

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    We present infrared spectra and images of the jovian aurorae taken at wavelengths sensitive to the H-3(+) molecular ion during the period around the impact of Comet Shoemaker Levy-9. The spectra were obtained using CGS4 on the United Kingdom Infrared Telescope and the images using NSF cam on NASA's Infrared Telescope Facility. Comparison with spectra obtained in May, 1993, shows that while the relative intensities of the northern and southern auroral zones prior to and during impact week (July 16 - 22, 1994) were broadly comparable with those of 1993, a few days after the last collision the northern aurora was considerably enhanced and its southern counterpart somewhat depressed. The north/south auroral ratio was returning to more normal values a week later. The effect of material drifting from the impact sites to the southern auroral zone is discussed in relation to these results

    Letter From J. William Stair to Alfred L. Shoemaker, May 10, 1950

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    In this typed letter from J. William Stair to Alfred L. Shoemaker dated May 10, 1950, Stair encloses an article on brick-end barns written by his son-in-law. He tells Dr. Shoemaker he will continue looking for more data on these barns, and asks for any information he can provide.https://digitalcommons.ursinus.edu/shoemaker_documents/1192/thumbnail.jp

    Letter from Helen J. Moser to Alfred L. Shoemaker, April 29th, 1954

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    In this handwritten letter from Helen J. Moser to Alfred L. Shoemaker, dated April 29th, 1954, Moser responds to Shoemaker\u27s radio broadcast by answering dialect riddles and providing a new one of her own.https://digitalcommons.ursinus.edu/shoemaker_documents/1240/thumbnail.jp

    Far‐UV emissions from the SL9 impacts with Jupiter

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    Observations with the International Ultraviolet Explorer (IUE) during the impacts of the fragments of comet D/Shoemaker-Levy 9 with Jupiter show far-UV emissions from the impact sites within a similar to 10 min time scale. Positive detections of H-2 Lyman and Werner band (1230-1620 Angstrom) and H-Ly alpha emissions are made for impacts K and S, and marginally for P2. No thermal continuum is observed. The radiated far-UV output was >10(21) ergs. The H-2 spectrum is consistent with electron collisional excitation if significant CH4 absorption is included. Such emissions could result from plasma processes generated by the impacts. Non-thermal excitation by the high altitude entry and explosion shocks may also be relevant. Emissions by Al+ (1671 Angstrom) and C (1657 Angstrom) of cometary origin are tentatively identified

    Letters From J. Daniel Roth to Alfred L. Shoemaker, September 19, 1956

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    A set of handwritten letters from J. Daniel Roth addressed to Alfred L. Shoemaker, dated September 19, 1956. Within, Roth writes humorous anecdotes about animals such as bulls and chickens and includes information about the proper method for clearing snow from rye plants.https://digitalcommons.ursinus.edu/shoemaker_documents/1286/thumbnail.jp

    Ancient Traditions of the Virgin Mary's Dormition and Assumption

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    Stephen J. Shoemaker, Ancient Traditions of the Virgin Mary's Dormition and Assumption (Oxford: University Press, 2003). Mary, Blessed Virgin, Saint -- Assumption. Mary, Blessed Virgin, Saint. Assumption of the Blessed Virgin Mary

    Stephen J. Shoemaker, Ancient Traditions of the Virgin Mary's Dormition and Assumption

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    Failler Albert. Stephen J. Shoemaker, Ancient Traditions of the Virgin Mary's Dormition and Assumption . In: Revue des études byzantines, tome 62, 2004. p. 310

    [Report to Chief J. E. Curry, by an unknown author #1]

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    Report to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney

    [Report to Chief J. E. Curry, by an unknown author #2]

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    Report to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
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