Create accountLogin

Recent searches

No recent searches

Search options

Only available when logged in.
toad.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
Mastodon server operated by David Troy, a tech pioneer and investigative journalist addressing threats to democracy. Thoughtful participation and discussion welcome.

Administered by:

Server stats:

281
active users

toad.social: AboutProfiles directoryPrivacy policy

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.3.8

#pluton

0 posts0 participants0 posts today
Public
Observatorio del IPA

El Observatorio Astronómico del IPA tiene el agrado de invitarles a esta charla magistral a cargo del astrónomo Lic. Julio A. Fernandez y organizada por los colegas profesores de Epistemología del IPA. A continuación el resumen de la actividad

En el marco del ciclo de clases abiertas de los cursos de Epistemología y Filosofía de la Educación, invitamos a participar de la actividad "El cielo y la memoria", a cargo del astrónomo y profesor Julio Ángel Fernández Alves.

Julio Ángel Fernández es licenciado en Astronomía por la Facultad de Humanidades y Ciencias de la Universidad de la República. Realizó investigaciones en el Observatorio Astronómico de Madrid y en el Instituto Max-Planck de Aeronomía de Alemania, y fue profesor visitante en el Observatorio de Valongo de la Universidad Federal de Río de Janeiro. Fue decano de la Facultad de Ciencias de la Universidad de la República y es investigador nivel III del Sistema Nacional de Investigadores de Uruguay. En 2006, durante el congreso de la Unión Astronómica Internacional en Praga, propuso la nueva definición de planeta que dejó a Plutón fuera de esa categoría. En 2016, fue incorporado a la Academia Nacional de Ciencias de los Estados Unidos.

Es autor del libro En Plutón y otras anécdotas. Historias mínimas de la humanidad contadas a través de los nombres de los planetas menores, donde recoge, entre otras, la historia del asteroide AnaDiego, nombrado en homenaje a Ana Teresa Diego, estudiante desaparecida durante la última dictadura argentina.

La charla invita a reflexionar sobre el vínculo entre el cielo y la memoria.

Fecha: 16 de mayo
Hora: de 10 a 12 hs
Lugar: Salón SUM del IPA

Organizan: Profs. Valentino Velázquez y María Piaser
Apoya: Observatorio Astronómico del IPA

Contacto: sofvalentino.velazquez@docente.ceibal.edu.uy

afiche de convocatoria a charla en el IPA
#asteroide#anadiego#pluton
Continued thread
Public
kīpuka

2/ L’actualité scientifique du quatrième trimestre 2023. Une double page est consacrée à la surveillance des volcans français des #Antilles (montagne Pelée et Soufrière), une autre à des études sur des volcans connectés au Kamtchatka et aux Galápagos… Enfin, une double page est dédiée au #volcanisme extraterrestre, avec la découverte d’un possible super(cryo)volcan sur #Pluton et des images thermiques de l’activité sur #Io prises par la sonde #Juno (ci-dessous, CC BY Davies et al. 2023).

Données JIRAM dans la bande 4,8 μm centrées sur les pôles Sud (a) et Nord (c) de Io. En (b) et (d), ces données sont superposées sur le fond cartographique du satellite, avec les principaux centres volcaniques légendés. Les pôles sont marqués d’une croix rouge. Les images, acquises lors d’orbites différentes (PJ10 et PJ43), n’ont pas la même résolution spatiale. CC BY Davies et al. (2023).
Public
Chris White

Where is Babel Rock?

The #USGS #BlueHills #quad #bedrock map and a #Quincy #Massachusetts #historical #map show Babel Rock overlooks a pond from just north of a bend in #Wampatuck Rd. I have been on that rock, and it's #diabase, a #mafic #intrusion into the Quincy #pluton. But the USGS #topographic quad & derivatives e.g. #GoogleEarth show it adjacent to the #BunkerHill #quarry (source of the #granite for the monument in #Boston).

Should a correction be proposed to USGS? Advice welcomed.

A USGS bedrock map of the vicinity of Babel Rock. The diabase intrusion of the Quincy Granite is marked with a blue arrow, and labeled as such on this map. The red arrow shows the approximate location of Bunker Hill quarry, and the location shown for Babel Rock on most current maps.
A crop of a map of Qunicy, Massachusetts from 1907. The blue arrow shows Babel Rock near the pond and inside the bend on Wampatuck Road. The Red Arrow indicates Bunker Hill Quarry, and is near the feature labeled Babel Rock on most current maps.
A crop of the Blue Hills quad USGS topo map, focused on the area of Babel Rock. The blue arrow indicates the feature labeled as Babel Rock on the historic and bedrock maps, but it is unlabeled here. The red arrow shows the feature near Bunker Hill Quarry that this map labels as Babel Rock.
This Google Earth view shows the area of Babel Rock. The blue arrow indicates a diabase exposure, which is labeled as Babel Rock on the USGS Blue Hills bedrock map and on the historic map. The red arrow shows the feature currently labeled as Babel Rock here and on the USGS topo map, near Bunker Hill quarry. Quarried exposures of Quincy Granite are visible above (north) of the feature labeled "Babel Rock" on this view.
Public
Chris White

We walked around #Cohasset, #Massachusetts #USA in the unusually warm (50 F, 10 C) “winter” weather here in #NewEngland. This is an (absurdly) prosperous #coastal community just south of #Boston. The walk included lovely views across coves and marshes (including #invasive Phragmites australis and #peat under #native #Spartina), as well as nice exposures of the > 600 Ma #Dedham #granite, the #pluton coring most of the #Avalon terrane in this area.
#photo #igneous #Proterozoic #geology #saltMarsh

View of sunlit Phragmites australis seed heads on a marsh edge in this square format color image. Golden, low winter light illuminates the seed head and marsh behind, with woods in the distance and a mostly clear blue sky with just streaks of clouds, blurred by the wide aperture used for this photo. My photo.
A view out onto Cohasset Cove at low tide, in a 2 wide to 1 high color image. A wall and tree in the right foreground are in shadow, above a small tidal creek that flows into the cove. In the near left, over a meter of peat has accumulated in the marsh, covered by spartina. There are buildings, boats, and a barrier island in the distance. My photo.
An eastern red cedar (Juniperus virginiana) grows from a crack in Dedham Granite in this 4 high to 5 wide rectangular crop monochrome image. The crack extends from the low left to bottom right corner, and it is hosting moss along with the tree. The small tree rises through the left center of the frame, with characteristic spiny branches and bristly needles. The Dedham Granite is light gray and coarse in texture. My photo.
Country rock in Dedham Granite. The fine-grained, medium gray rock on the left is probably a chunk of surrounding rock that was plucked into the Dedham pluton (coarse, light gray rock at right) during intrusion. A small tuft of grass is on the right side of this square image. My photo.
Public *
Jerry D. Harris 🦕👣

Intrusive contact between the sedimentary, Eocene Claron Formation below and the quartz-monzonite Pine Valley Mountains laccolith above. The Pine Valley laccolith is the world's largest example of such a pluton. Around 21 million years ago, magma intruded within the Claron Formation at a depth of about 200 m, shallower than is typical for a laccolith, allowing the magma to spread far laterally and dome up higher than normal. #geology #geoscience #igneous #Utah #pluton #laccolith #naturalhistory

Red, horizontal, lacustrine & fluvial strata of the Claron Formation lie below the dark igneous rock of the Pine Valley Mountains laccolith, which exhibits columnar jointing at its base.
ExploreLive feeds
About