4,107 research outputs found
The effect of the impact of comet Shoemaker Levy‐9 on Jupiter's aurorae
No full textWe 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 to Alfred L. Shoemaker, February 10, 1948
No full textA handwritten letter from an unknown author addressed to Alfred L. Shoemaker, dated February 10, 1948. Within, the author discusses the Pennsylvania Dutch word for Ash Wednesday, along with traditions associated with this day.https://digitalcommons.ursinus.edu/shoemaker_documents/1118/thumbnail.jp
Far‐UV emissions from the SL9 impacts with Jupiter
No full textObservations 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
Letter From Ira D. Landis to Alfred L. Shoemaker, October 29, 1949
No full textA handwritten letter from Ira D. Landis addressed to Alfred L. Shoemaker, dated October 29, 1949. Within, Landis encloses his paper entitled, The Dutch-Calcium Carbonate Compound , with hopes of it finding a home within Shoemaker\u27s Dutchman newspaper.https://digitalcommons.ursinus.edu/shoemaker_documents/1021/thumbnail.jp
Letter From Helen D. Witmer to Alfred L. Shoemaker, November 17, 1948
No full textA typed letter from Helen D. Witmer addressed to Alfred L. Shoemaker, dated November 17, 1948. Within, Witmer details her favorite all story about asking for directions in Columbia, Pennsylvania. She also details her family\u27s experiences growing up with Pennsylvania Dutch expressions and suggests Shoemaker look into the use of the word wonderful by people in Lancaster County.https://digitalcommons.ursinus.edu/shoemaker_documents/1031/thumbnail.jp
Letter From D. Edward Elder to Alfred L. Shoemaker, July 10, 1958
No full textA handwritten letter from D. Edward Elder of Harrisburg, Pennsylvania addressed to Alfred L. Shoemaker, dated July 10, 1958. Within, Elder informs Shoemaker of a rough drawing of a broadside of Adam and Eve that is enclosed within the letter.https://digitalcommons.ursinus.edu/shoemaker_documents/1010/thumbnail.jp
Letter From Willis D. Faust to Alfred L. Shoemaker, May 3, 1954
No full textA handwritten letter from Willis D. Faust addressed to Alfred L. Shoemaker, dated May 3, 1954. Within, Faust writes in response to an inquiry made on Shoemaker\u27s radio program involving Peter and Paul\u27s day on the church calendar and relates other stories from his childhood.https://digitalcommons.ursinus.edu/shoemaker_documents/1154/thumbnail.jp
Letter from William D. Pattison to Alfred L. Shoemaker, September 20, 1959
No full textA letter from William D. Pattison to Alfred L. Shoemaker, dated September 20, 1959. Within, Pattison informs Shoemaker of Walter Horn\u27s lectures about the history of Western barns and how they may relate to Pennsylvania barns.https://digitalcommons.ursinus.edu/shoemaker_documents/1222/thumbnail.jp
Letter From D. W. Thompson to Alfred L. Shoemaker, April 3, 1956
No full textA typed letter from D. W. Thompson addressed to Alfred L. Shoemaker, dated April 3, 1956. Within, Thompson provides a recipe for Scotch Cake, discusses the Pennsylvania Dutch term for taffy and speculates about sugar rings.https://digitalcommons.ursinus.edu/shoemaker_documents/1204/thumbnail.jp
Letter From Elizabeth D. Naftzinger to Alfred L. Shoemaker, February 10, 1948
No full textA handwritten letter from Elizabeth D. Naftzinger addressed to Alfred L. Shoemaker, dated February 10, 1948. Within, Naftzinger details how the last boy to arrive at school on Ash Wednesday was dubbed Esha Puddle and rolled in the school\u27s ash pile by the other boys.https://digitalcommons.ursinus.edu/shoemaker_documents/1124/thumbnail.jp
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