Results 51 to 60 of about 3,964 (181)

Influence of solar activity upon light curves of comets P/Halley (1986 3) and P/Churyumov-Gerasimenko (1982 8) [PDF]

open access: yes
It is shown that the comet P/Halley's (1986 3) total magnitudes correlate with changes in the solar activity indices and the solar wind velocity. A statistically reliable correlation between the outbursts of brightness and magnitude variations of the ...
Churyumov, Klim I., Filonenko, V. S.
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

Polarimetric observations of comet Levy 1990c and of other comets: Some clues to the evolution of cometary dust [PDF]

open access: yes
The evolution with the phase angle alpha of the polarization degree P of light scattered by comet Halley's dust is well documented. No significant discrepancy is found between Halley and Levy polarization curves near the inversion point.
Hadamcik, E.   +2 more
core   +1 more source

Extended performance solar electric propulsion thrust system study. Volume 4: Thruster technology evaluation [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. Emphasis was placed on relatively high power missions (60 to 100 kW) such as a Halley'
Beattie, J. R.   +8 more
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

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