Results 91 to 100 of about 6,820 (225)

Giotto Extended Mission (GEM) [PDF]

open access: yes
The primary objectives of the Giotto Extended Mission (GEM), are to determine the composition and physical state of the Grigg Skjellerup Comet's nucleus; to determine the processes that govern the composition and distribution of neutral and ionized ...
Grensemann, M., Wilkins, D. E. B.
core   +1 more source

The eleven observations of comets between 687 AD and 1114 AD recorded in the Anglo Saxon Chronicle [PDF]

open access: yes
This research paper is an examination of the eleven cometary references (679AD, 729AD, 892AD, 950AD, 975AD, 995AD, 1066AD, 1097AD, 1106AD, 1110AD and 1114AD) found in the various manuscripts of The Anglo Saxon Chronicle between 678 AD and 1114 AD.
Mardon, A. A.   +2 more
core   +1 more source

Ion propulsion and Comet Halley rendezvous [PDF]

open access: yes
Cometary rendezvous missions using ion propulsion is considered. The characteristics of the ion engine are discussed including the fuel efficiency and acceleration, and the design of the ion engine is described.
Atkins, K. L.
core   +1 more source

Comparison of the 3.36 micrometer feature to the ISM [PDF]

open access: yes
It has been noted that the 3.36 micrometer emission feature is not the same as that of any ISM band at 3.4 micrometer. This is documented herein. There is no convincing analog to the cometary 3.36 micrometer emission feature seen in the Interstellar ...
Brooke, Timothy Y., Tokunaga, Alan T.
core   +1 more source

Extended performance solar electric propulsion thrust system study. Volume 1: Executive summary [PDF]

open access: yes
Several thrust system design concepts were evaluated and compared using the specifications of the most advanced 30 cm engineering model thruster as the technology base.
Hawthorne, E. I., Poeschel, R. L.
core   +1 more source

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