New Horizons - Pluton, nous voilà !

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Résumé traduit de l'article publié dans Science sur le Blog du Dr Eric Simon :

Je savoure tout particulièrement ce passage : 

"Etant donné que la géologie de MU69 montre seulement un petit nombre de cratères, les chercheurs en déduisent que le nombre de KBO de moins de 1 km, qui seraient responsables de quantités de collisions et de nombreux petits cratères, est moins important que ce que l'ont pensait."  


:D :x :P 9_9:)

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En vous inscrivant sur Astrosurf,
ce type d'annonce ne sera plus affiché.
Astronomie solaire : la bible est arrivée !
400 pages, plus de 800 illustrations !
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L'Union Astronomique Internationale a officialisé 14 nouveaux noms désignant des endroits sur Pluton


Alcyonia Lacus, a possible frozen nitrogen lake on Pluto's surface, is named for the bottomless lake in or in the vicinity of Lerna, a region of Greece known for springs and swamps; the Alcyonian lake was one of the entrances to the underworld in Greek mythology.

Elcano Montes is a mountain range honoring Juan Sebastián Elcano (1476–1526), the Spanish explorer who in 1522 completed the first circumnavigation of the Earth (a voyage started in 1519 by Magellan).

Hunahpu Valles is a system of canyons named for one of the Hero Twins in Mayan mythology, who defeated the lords of the underworld in a ball game.
Khare crater honors planetary scientist Bishun Khare (1933–2013), an expert on the chemistry of planetary atmospheres who did laboratory work leading to several seminal papers on tholins – the organic molecules that probably account for the darkest and reddest regions on Pluto.

Kiladze crater honors Rolan Kiladze (1931–2010), the Georgian (Caucasus) astronomer who made pioneering early investigations the dynamics, astrometry and photometry of Pluto.

Lowell Regio is a large region honoring Percival Lowell (1855–1916), the American astronomer who founded Lowell Observatory and organized a systematic search for a planet beyond Neptune.

Mwindo Fossae is a network of long, narrow depressions named for the Nyanga (Eastern Dem. Rep. Congo/Zaire) epic hero who traveled to the underworld and after returning home became a wise and powerful king.

Piccard Mons is a mountain and suspected cryovolcano that honors Auguste Piccard (1884–1962), a 20th century inventor and physicist best known for his pioneering balloon flights into Earth's upper atmosphere.

Pigafetta Montes honors Antonio Pigafetta (c. 1491–c. 1531), the Italian scholar and explorer who chronicled the discoveries made during the first circumnavigation of the Earth, aboard Magellan's ships.

Piri Rupes is a long cliff honoring Ahmed Muhiddin Piri (c. 1470–1553), also known as Piri Reis, an Ottoman navigator and cartographer known for his world map. He also drew some of the earliest existing maps of North and Central America.

Simonelli crater honors astronomer Damon Simonelli (1959–2004), whose wide-ranging research included the formation history of Pluto.
Wright Mons honors the Wright brothers, Orville (1871–1948) and Wilbur (1867–1912), American aviation pioneers credited with building and flying the world's first successful airplane.

Vega Terra is a large land mass named for the Soviet Vega 1 and 2 missions, the first spacecraft to fly balloons on another planet (Venus) and to image the nucleus of a comet (1P/Halley).

Venera Terra is named for the Venera missions sent to Venus by the Soviet Union from 1961–1984; they included the first human-made device to enter the atmosphere of another planet, to make a soft landing on another planet and to return images from another planetary surface.




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reportage sur New Horizon jusqu'à Ultima Thulé ce soir sur Arte

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Ca date de 2019, c'est tout récent (première diffusion de ce documentaire?) - vu en replay, merci je l'avais raté (pour une obs. de Jupiter B|).


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Au congrès conjoint EPSC-DPS qui se déroule actuellement (15–20 sept. 2019) à Genève ( ), voici une sélection de quelques présentations (abstracts uniquement, hélas :|) concernant les résultats de NH sur Ultima Thule (2014 MU69) :

Jeudi 19 sept. (posters)


EPSC-DPS2019-1140 - Paul Schenk
Topography of Pits & Troughs on Ultima Thule (2014mu69) from New Horizons.




EPSC-DPS2019-1235 - Kelsi Singer
Impact craters on 2014 MU69: The geologic history of MU69 and Kuiper belt object size-frequency distribution.


etc ...


Vendredi 20 sept. (exposés oraux)


EPSC-DPS2019-896 - John Spencer
Geology and Geophysics of 2014 MU69: New Horizons Flyby Results.


EPSC-DPS2019-639 - Catherine Olkin
The Color of 2014 MU69 from New Horizons.


EPSC-DPS2019-311 - Simon Porter
The Shape and Pole of (486958) 2014 MU69.


EPSC-DPS2019-100 - Jason Hofgartner
Albedo Map of Kuiper Belt Object 2014 MU69 and Comparison with Cognate Solar System Objects.


EPSC-DPS2019-922 - James Keane
The Geophysical Environment of (486958) 2014 MU69.


etc ...


A suivre sur :

Edited by BobMarsian
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C'est encore avec un extrême plaisir que je mets en exergue ce lien particuliers qui aurait tendance à rester trop discret, perdu dans la masse des documents fournis par Bob'.


Doc' sur la cratérisation de MU69 déduite des observations faites par NH et qui confirmera que cratérisation ne sera pas synonyme de castration. :)



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