Joaquín García

@GarciafXimo

Físico. Profesor jubilado. Amante de la y de los . Me gusta la y planetaria. No me disgusta la .

Valencia, Comunidad Valenciana
Vrijeme pridruživanja: travanj 2014.

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  1. Prikvačeni tweet
    18. kol 2017.
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  2. proslijedio/la je Tweet
    prije 2 sata

    L’estació ISS entra a l’ombra de la Terra. Esquerra Venus, centre entre núvols ISS. Vídeo. Vist des de Campanar (València) 5-2-2020 20:14h alçada 68°.

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    prije 5 sati

    An orbital water-ice cycle on comet 67P/Churyumov–Gerasimenko from colour changes. There are two opposite seasonal colour cycles in the coma and on the surface of comet 67P through its perihelion passage.

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    HiPOD 5 Feb 2020: An Impact North of Valles Marineris Before and after images enable us to “age” a crater to within a few months or years. HiRISE often confirms the existence of craters identified in pre-existing lower resolution images. NASA/UArizona

    An Impact North of Valles Marineris: Before and after images enable us to “age” a crater to within a few months or years. HiRISE often confirms the existence of craters identified in pre-existing lower resolution images. (NASA/UArizona)
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    An incredible new animation of the movement of the continents, the great ice ages & ever-changing sea levels over the history of animal life, by Christopher Scotese.

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  6. prije 5 sati

    La ISS desde València ahora mismo

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    5. velj
    Odgovor korisnicima i sljedećem broju korisnika:

    I jo també veient el mateix des del Campus de Burjassot

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    prije 13 sati
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    A winter morning in Valencia. Un mattino d’inverno a Valencia.

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    prije 13 sati

    in 1971, the Apollo 14 LM Antares landed on the Moon. "It's been a long way, but we're here"- said comm. Shepard as he stepped from the LM onto Fra Mauro highlands, togheter with Mitchell. Roosa remained in LO aboard the Kittyhawk. Here, Shepard hit 2 golf balls on the moon.

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    in 1971 14 was the eighth crewed mission in the United States Apollo program, the third to land on the , and the first to land in the lunar highlands. They were two-day stays on the Moon with two lunar EVAs, or moonwalks.

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    prije 16 sati
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    4. velj

    La Lluna. Matant el cuc astronòmic. Mare Imbrium. Plató, Arquimedes, Eratòstenes, Copernicus. Sinus Iridium. Des de Campanar (València) 4-2-2020.

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    3. velj
    Odgovor korisnicima

    Incorrecto. Las rocas más antiguas que se conocen en la Tierra son las del gneis de Acasta, con entre 3580 y 4031 Ma. El cinturón de rocas verdes de Nuvvuagittuq podría ser más viejo que la roca lunar en cuestión (hasta 4338 Ma), pero existe incertidumbre respecto a su edad.

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    3. velj

    HiPOD 3 febrero 2020: Barrancos escarchados Los barrancos en Marte se forman durante el invierno, se vuelven fluidos debido a la escarcha de dióxido de carbono, por lo que hacemos un seguimiento de la actividad en estos lugares a lo largo del año.

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  16. 4. velj

    Accretion disks around young stars: the cradles of planet formation

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    4. velj
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    501. When Comet Siding Spring flew past Mars in 2014, many spacecraft there managed to snap photographs of it! Here's some views from the HiRISE camera aboard NASA's Mars Reconnaissance Orbiter, ~150,000 km away from the comet. (Earlier threads: )

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    4. velj

    Today paper about GJ 1148 M-dwarf star hosting a planetary system: “Dynamical characterization of the multiple planet system GJ 1148 and prospects of habitable exomoons around GJ 1148 b” (Trifonov et al. )

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    4. velj
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    3. velj

    Tonight we will be observing from the Arecibo Observatory, Teegarden's Star, a star with two potentially habitable planets. Arecibo can determine how good or bad is this star for its planets and even discover new objects, such as brown dwarfs.

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