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REGO G.

Space Exploration  - 
 
 
Qué le pasa a la Luna?
Vagando alrededor de la Tierra en julio de 2006, los cosmonautas de la Estación Espacial
Internacional (EEI) observaron una Luna creciente flotando más allá del horizonte.
La imagen captada es interesante porque
parte de la Luna se ve azul y otra parte no se ve.
Ambos efectos son creados por la atmósfera
de la Tierra.
Las moléculas de aire dispersan más eficientemente la luz
mientras más azul esta sea, haciendo que un observador en el suelo vea el
cielo celeste y que los cosmonautas vean el
horizonte azul.
Aparte de reflejar la luz solar, estas moléculas atmosféricas
también desvían la luz lunar, por lo que la parte baja de la Luna parece desvanecerse.
Si uno mira más arriba en la
fotografía,
la atmósfera, haciéndose menos densa, parece diluirse al negro.
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REGO G.
 
Por eso en la imagen de la comunidad cree una dispersión de la imagen de la luna de Plutón, caronte
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Thorfinn Hrolfsson

Space Exploration  - 
 
Materials provided by Southwest Research Institute.
After a two-year orbital tour around comet 67P/Churyumov-Gerasimenko, ESA’s Rosetta spacecraft — carrying Southwest Research Institute’s Alice ultraviolet spectrograph — will end its mission this week on Sept. 30. Rosetta is the first spacecraft to orbit and escort a comet, and Alice, developed and operated for NASA, is the first instrument to obtain far-ultraviolet observations at a comet.

“Alice did its job perfectly, taking over 70,000 spectra in two years, providing a gold mine of data for comet scientists to study for years to come,” says Dr. Alan Stern, Alice principal investigator and an associate vice president of SwRI’s Space Science and Engineering Division.
Alice probed the origin, composition and workings of comet 67P’s atmosphere and surface, collecting high-resolution data that allows scientific insights not possible with ground-based or Earth-orbital observations. Its discoveries include finding an unexpectedly porous, “fluffy” dark surface. Alice also documented a surprising lack of exposed water ice on the comet’s surface and identified an extremely volatile, unexpected gas in the comet’s atmosphere — molecular oxygen.

“The Rosetta mission has provided an unprecedented window into the origin of comets and the way comets work,” says SwRI’s Dr. Joel Parker, Alice’s deputy principal investigator.
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T-rex velociraptor

Space Exploration  - 
 
 
Hinweise gibt es schon länger, aber jetzt ist Forschern der Nasa offenbar der direkte Nachweis von bis zu 200 Kilometer hohen #Wasserfontänen auf dem #Jupitermond #Europa gelungen. Die Forscher haben dabei aber auch die ersten, 2012 gefundenen, Hinweise auf Wasserfontänen am #Südpol des #Himmelskörper s untersucht.
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Forschern der Nasa ist offenbar der direkte Nachweis von bis zu 200 Kilometer hohen Wasserfontänen auf dem Jupitermond Europa gelungen. Die Entdeckung könnte eine wichtige Rolle
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sandip mehta

Space Exploration  - 
 
Astrophysicist Paul Sutter discusses the galactic monsters called black holes, revealing how they could dissolve … over time.
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Ciro Villa
owner

Space Exploration  - 
 
Rosetta in its final approach!

11.7 km altitude.
Rosetta’s OSIRIS narrow-angle camera captured this image of Comet 67P/Churyumov-Gerasimenko at 05:25 GMT from an altitude of about 11.7 km during the spacecraft’s final descent on 30 September.The image scale is about 22 cm/pixel and the image measures about 450 m across.
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"We is down among 'em Charlie!"
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Ciro Villa
owner

Space Exploration  - 
 
 
#SciFi meets sci fact: Cosmic rays striking #Mars add krypton isotopes to the Red Planet's atmosphere.
NASA's Curiosity rover has found evidence that chemistry in the surface material on Mars contributed to the makeup of its atmosphere.
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Journal Reference:
P.G. Conrad, C.A. Malespin, H.B. Franz, R.O. Pepin, M.G. Trainer, S.P. Schwenzer, S.K. Atreya, C. Freissinet, J.H. Jones, H. Manning, T. Owen, A.A. Pavlov, R.C. Wiens, M.H. Wong, P.R. Mahaffy. In situ measurement of atmospheric krypton and xenon on Mars with Mars Science Laboratory. Earth and Planetary Science Letters, 2016; 454
http://dx.doi.org/10.1016/j.epsl.2016.08.028
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Rahul kumar jaiswal

Space Exploration  - 
 
 
The ESA - European Space Agency's Rosetta Mission ends with a controlled decent to the surface of comet 67/P Friday, Sept. 30 around 7:20AM EDT.

here is more details about these 2 images .

Image-1

Artist's concept of Rosetta shortly before hitting Comet 67P/Churyumov–Gerasimenko on Sept. 30, 2016
Credits: ESA/ATG MediaLab

image-2

Mosaic of four images taken by Rosetta's navigation camera (NAVCAM) on 19 September 2014 at 28.6 km (17.8 mi) from the centre of comet 67P/Churyumov–Gerasimenko. The images used for this mosaic were taken in sequence as a 2×2 raster over an approximately 20 minute period, meaning that there is some motion of the spacecraft and rotation of the comet between the images. The four individual full-frame images are also available as related images below. Note this mosaic has been rotated by 180 degrees and cropped. The mosaic has been put together using Microsoft ICE. This left a few small regions requiring slight exposure adjustments using Adobe LightRoom. The full image has then been lightly contrast enhanced to bring out the activity without increasing the background noise too much.

Credit: ESA/Rosetta/NAVCAM
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Thorfinn Hrolfsson

Space Exploration  - 
 
by Michigan State University.
To determine how the universe’s heavy elements – gold, silver and many others – came about, a team of international researchers is studying both the largest and smallest things known to us – stars and atoms.  The team, led by scientists from Michigan State University, is providing critical data to computer models of what are known as stellar events – supernovas and neutron stars mergers, to be exact.  By matching the computer models with real observations of these cataclysmic events, it could help answer one of astronomy’s most puzzling questions.

A supernova is a star that, in its old age, collapses and then catastrophically explodes under its own weight; a neutron-star merger occurs when two of these small yet incredibly massive stars come together and spew out huge amounts of stellar debris.  By conducting experiments in MSU’s National Superconducting Cyclotron Laboratory, the researchers were able to come a bit closer to determining what actually goes on during these stellar events, an important step in determining how heavy elements were formed.

What the researchers were looking at, at the atomic-sized level, is something called neutron capture. This is when an atom latches onto a neutron, increasing its mass number and helping it attain “heavy” status.  The heavy elements produced in these processes have atomic numbers greater than 26. The atomic number is the number of protons in the nucleus of an atom.

Journal Reference:
S. N. Liddick, A. Spyrou, B. P. Crider, F. Naqvi, A. C. Larsen, M. Guttormsen, M. Mumpower, R. Surman, G. Perdikakis, D. L. Bleuel, A. Couture, L. Crespo Campo, A. C. Dombos, R. Lewis, S. Mosby, S. Nikas, C. J. Prokop, T. Renstrom, B. Rubio, S. Siem, S. J. Quinn. Experimental Neutron Capture Rate Constraint Far from Stability. Physical Review Letters, 2016; 116 (24)
http://dx.doi.org/10.1103/PhysRevLett.116.242502
To determine how the universe's heavy elements - gold, silver and many others - came about, a team of international researchers is studying both the largest and smallest things known to us - stars and atoms.
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THANK YOU ALWAYS UNITY WITHIN DIVERSITY PEACETIME
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Iftekharul Bashar

Space Exploration  - 
 
Study may give new respect to our Milky Way neighborhood...
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Mahadi Raof

Space Exploration  - 
 
 
The first potential twin planets spotted outside our solar system may be drawing closer together.
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Jaime Rosas Reyes

Space Exploration  - 
 
Space perspective!
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REGO G.

Space Exploration  - 
 
 
La nave Rosetta ha aterrizado con éxito en su cometa y se ha apagado para siempre. Es el final de una misión espacial histórica, la primera en orbitar y descender a un cometa activo.
Los últimos minutos de descenso se han seguido desde el centro de control de la Agencia Espacial Europea (ESA) en Alemania en completo silencio, hasta que han estallado los aplausos unos instantes antes que el responsable del control confirmase que la misión había concluido con éxito. "Esto es todo”, ha dicho Patrick Martin, líder de la misión. “Esta es la culminación de un éxito científico y técnico tremendo”.
De hecho, Rosetta ha debido aterrizar unos 10 minutos pasadas las 12:30, hora peninsular española, pero la señal tarda en llegar a la Tierra 40 minutos. Una vez toma tierra, un software detecta el impacto y automáticamente apaga la nave sin posibilidad de volverla a encender.
Durante su descenso, la nave de la ESA ha ido enviando detalladas imágenes del cometa, que se encuentra a más de 700 millones de kilómetros de la Tierra. Esas imágenes son históricas: nunca un instrumento humano había estado tan cerca de un cometa y había podido retratar la superficie de estos cuerpos, imprescindibles para entender el origen del Sistema Solar y posiblemente el origen de la vida.
creditos:esa
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sandip mehta

Space Exploration  - 
 
Los Angeles Times: Astronomers spot spiral arms swirling around a young star, offering clues to planet formation. http://www.latimes.com/science/sciencenow/la-sci-sn-planets-forming-20160929-snap-story.html
An international team of astronomers has discovered what might be the first evidence of density-driven spiral arms in the gas and dust around a still-forming star.
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Aidin Ashoori

Space Exploration  - 
 
 
Fomalhaut b
https://en.wikipedia.org/wiki/Fomalhaut_b

Fomalhaut b, also known as Dagon, is a confirmed directly imaged extrasolar object and candidate planet orbiting the A-type main-sequence star Fomalhaut, approximately 25 light-years away in the constellation of Piscis Austrinus. The object was initially announced in 2008 and confirmed as real in 2012 from images taken with the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope and, according to calculations reported in January 2013, has a 1,700-year, highly elliptical orbit. It has a periastron of 7.4 billion km (~50 AU) and an apastron of about 44 billion km (~300 AU). As of May 25, 2013 it is 110 AU from its parent star
http://www.nasa.gov/mission_pages/hubble/science/rogue-fomalhaut.html
This false-color composite image, taken with the Hubble Space Telescope, reveals the orbital motion of the planet Fomalhaut b. Based on these observations, astronomers calculated that the planet is in a 2,000-year-long, highly elliptical orbit. The planet will appear to cross a vast belt of debris around the star roughly 20 years from now. If the planet's orbit lies in the same plane with the belt, icy and rocky debris in the belt could crash into the planet's atmosphere and produce various phenomena. The black circle at the center of the image blocks out the light from the bright star, allowing reflected light from the belt and planet to be photographed. The Hubble images were taken with the Space Telescope Imaging Spectrograph in 2010 and 2012. Credit: NASA, ESA, and P. Kalas (University of California, Berkeley and SETI Institute
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REGO G.

Space Exploration  - 
 
 
Algunas caracterísicas superficiales de Encelado son como cintas transportadoras ?
Una interpretación puntera de imagenes recientes tomadas de la luna más explosiva de Saturno indica que si.
Esta forma de actividad tectónica asimétrica, muy inusual en la Tierra, probablemente sostiene algunas pistas de la estructura interna de Encelado , que podría contener mares subterráneos donde la vida podría tener lugar.
El retrato de arriba es una composición de 28 imagenes tomadas por la sonda robótica Cassini en el 2010 justo después de sobrevolar el helado orbe.
La inspección de estas imagenes nos muestran claros desplazamientos tectónicos donde grandes porciones de superficie parecen moverse conjuntamente en una sola dirección.
Cerca de la parte superior de la imagen aparece una de las divisiones tectónicas más prominentes: Labtayt Sulci , un cañón de aproximadamente un kilómetro de profundidad.
Créditos: Cassini Imaging Team, SSI, JPL, ESA,NASA 
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follow the water.
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Bora Uzun

Space Exploration  - 
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REGO G.

Space Exploration  - 
 
 
¿Cómo se crearon estos inmensos acantilados de Marte? ¿Quizás hubo alguna catarata en el pasado recorriendo esos surcos? Fue o bien el agua o bien la lava lo que esculpió este altísimo acantilado que rodea el cañon Echus, (justo al lado del impresionante cráter de un meteoro), con un desnivel de cuatro kilómetros.
Una de las hipótesis principales es que el cañón Echus, con sus diez kilómetros de anchura y cien de longitud, fue en su día una de las mayores masas de agua de Marte. Si esto fuese correcto, el agua contenida en él habría acabado creando el impresionante valle Kasei, el cual se extiende más de tres mil kilómetros hacia el norte. No obstante, aunque el agua hubiese sido el principal agente erosionador, parece ser que haya habido un flujo de lava en una etapa posterior. Esto explicaría que el suelo del cañón sea tan excepcionalmente liso.
El cañón Echus se encuentra al norte del gigantesco valle Marineris, la mayor depresión del Sistema Solar. La imagen de hoy se tomó desde la sonda robótica Mars Express, en órbita alrededor de Marte.
Créditos: G. Neukum (FU Berlin) et al.,Mars Express, DLR, ESA
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awesome image.. !
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