Results 21 to 30 of about 46,866 (155)
Predictions of the solar wind interaction with Comet Grigg-Skjellerup [PDF]
, 1992 The planned encounter of the Giotto spacecraft with comet Grigg-Skjellerup on 10th July 1992 promises to extend our knowledge of the solar wind interaction with comets substantially.
Johnstone, AD +2 more
core
Halley's comet on the day of its closest pass to Earth
, 2021 Mount Stromlo and Siding Spring Observatory - 2.3m Telescope Information Booklet, Star Plots, Site, Equipment, Photos from Telescope, Halley's Comet - Mr. John Hart, Mr. Gary Bradshaw, Mr. Ed Roberts, Dr. Michael Dojnta, Prof. John Mathewson, Mr.
Photographer: Bob Cooper
core +1 more source
Dating the execution of John the Baptist and the crucifixion of Jesus Christ
RUDN Journal of World HistoryThe study is devoted to clarifying the chronology of such significant events of gospel history as the execution of John the Baptist and the crucifixion of Jesus Christ.
Vladimir O. Nikishin
doaj +1 more source
Effects of Comet Encke's Meteoroid Stream on the Seasonal Variation of Mercury's Ca Exosphere
Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.Abstract Mercury's calcium (Ca) exosphere, observed by NASA's MESSENGER mission, exhibits high temperatures (>50000 K) and pronounced seasonal variability, with its source mainly on the dawn side. Enhanced Ca emission near True Anomaly Angle (TAA) ∼25° and ∼150° has been attributed to Comet 2P/Encke meteoroid streams.
M. Moroni +18 more
wiley +1 more source
Opportunities for ballistic missions to Halley's comet [PDF]
, 1977 Alternative strategies for ballistic missions to Halley's comet in 1985-86 are described. A large scientific return would be acquired from a ballistic Halley intercept in spite of the high flyby speeds that are associated with this mission mode.
Wooden, W. H., II, Farquhar, R. W.
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Halley's Comet in History, Patrick Moore
, 1985 An illustrated slide lecture of Halley's Comet in history (from 17th century) including 1986 encounter probes, other comets and ...
ANU Instructional Resources Unit (1975-1996) +1 more
core +1 more source
Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.Abstract High‐altitude optical meteors initiating above 150 km are exceedingly rare, with confirmed observations largely confined to the Leonids. Using the Meteor and ionospheric Irregularity Observation System, we recorded a bright 43‐Cassiopeiids fireball with heterogeneous material. It initiated luminously at an exceptional altitude of 157.8 ± $\pm $
Yi Li +12 more
wiley +1 more source
Transport of Water in a Transient, Impact‐Generated Atmosphere on Mercury
Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.Abstract Mercury's polar cold traps host water ice deposits that are likely populated with impact‐delivered water via Mercury's exosphere. However, Mercury's near‐sun location experiences an extremely high photodestruction rate that rapidly destroys water with a timescale of only ∼3.5 hr.
J. K. Steckloff +4 more
wiley +1 more source
The theory of the motion of Halley Comet [PDF]
Symposium - International Astronomical Union, 1986 The theory of the motion of Halley comet has been built using ground optical positional observations of 1682, 1759, 1835, 1910 and 1982–84. The orbital elements of the comet and two coefficients characterizing non-gravitational perturbations were determined precisely as a result of the statistical treatment of the observations.
E. L. Akim +5 more
openaire +1 more source