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Carl Sagan describes the terrible conditions of Venus using the information of the Soviet Venera probes
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Carl Sagan describes the terrible conditions of Venus using the information of the Soviet Venera probes / Карл Саган описывает ужасные условия Венеры,… - SOVIET SPACE PROGRAM (Космическая программа СССР) - Google+
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Thorfinn Hrolfsson

Space Exploration  - 
 
University of Bern
Normally computers speed up calculations. But with his new pen-and-paper formula Kevin Heng of the University of Bern gets his results thousands of times faster than using conventional computer codes. The astrophysicist calculates the abundances of molecules (known as atmospheric chemistry) in exoplanetary atmospheres. Ultimately, deciphering the abundances of molecules allows us to interpret if features in a spectrum are due to physics, geology or biology.

With their sophisticated instruments, astronomers today not only detect new exoplanets outside our solar system but are able to characterize the atmospheres of some of these distant worlds. To know what to anticipate and when to be surprised theorists calculate the expected abundances of molecules. Kevin Heng, director of the Centre of Space and Habitability (CSH) at the University of Bern, is an expert in these calculations. “The sun – and other stars – have a very definite proportion of chemical elements like hydrogen, carbon, oxygen or nitrogen”, he explains: “And there is a lot of evidence that planets form from the essence of stars.” But whereas in stars the elements exist as atoms, in the lower temperatures of exoplanetary atmospheres they form different molecules according to temperature and pressure.
Journal Reference:
Kevin Heng, Jared Workman. ANALYTICAL MODELS OF EXOPLANETARY ATMOSPHERES. I. ATMOSPHERIC DYNAMICS VIA THE SHALLOW WATER SYSTEM. The Astrophysical Journal Supplement Series, 2014; 213 (2): 27
http://dx.doi.org/10.1088/0067-0049/213/2/27
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Jennifer Korszun

Space Exploration  - 
 
#TechNews #Aerospace #NASA
Two super-Earth-sized planets were discovered by NASA’s Kepler spacecraft orbiting a nearby sun-sized star known as HD 3167, located 150 light years away.
http://goo.gl/7NanAC
Two newly discovered super-Earth-sized planets found orbiting a nearby star - Electronic Products
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Thorfinn Hrolfsson

Space Exploration  - 
 
Los Alamos National Laboratory
New software is enabling ChemCam, the laser spectrometer on NASA’s Curiosity Mars rover, to select rock targets autonomously—the first time autonomous target selection is available for an instrument of this kind on any robotic planetary mission. Developed jointly at Los Alamos National Laboratory and the Research Institute in Astrophysics and Planetology in Toulouse, France, the ChemCam (chemistry and camera) instrument aboard Curiosity “zaps” rocks on Mars and analyzes their chemical make-up. While most ChemCam targets are still selected by scientists, the rover itself now chooses multiple targets per week.
“This new capability will give us a chance to analyze even more rock and soil samples on Mars,” said Roger Wiens, principal investigator for ChemCam at Los Alamos. “The science team is not always available to pick samples for analysis. Having a smarter rover that can pick its own samples is completely in line with self-driving cars and other smart technologies being implemented on Earth.”
To select a target autonomously, the software uses adjustable criteria specified by scientists, such as identifying rocks based on their size or brightness. The criteria can be changed depending on the rover’s surroundings and the scientific goals of the measurements.
New software is enabling ChemCam to select rock targets autonomously—the first time autonomous target selection is available for an instrument of this kind on any robotic planetary mission.
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Aswin As

Space Exploration  - 
 
21 July 1961. Lift-off of Mercury-Redstone 4 with Liberty Bell 7 carrying Colonel Virgil "Gus" Grissom on a 15-minute suborbital flight. The capsule reached a maximum altitude of 102 nautical miles (190 km) and travelled 262 nautical miles (468 km) downrange before splashing down in the Atlantic. http://goo.gl/cR7tgl

#ProjectMercury #NASAhistory #TBT
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Aidin Ashoori

Space Exploration  - 
 
This image of the Saturn moon Titan was taken by the Cassini spacecraft earlier this month during a flyby.

NASA / JPL / SSI
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Thorfinn Hrolfsson

Space Exploration  - 
 
NASA
Hubble Space Telescope astronomers have conducted the first search for atmospheres around temperate, Earth-sized planets beyond our solar system and found indications that increase the chances of habitability on two exoplanets.

Specifically, they discovered that the exoplanets TRAPPIST-1b and TRAPPIST-1c, approximately 40 light-years away, are unlikely to have puffy, hydrogen-dominated atmospheres usually found on gaseous worlds.
“The lack of a smothering hydrogen-helium envelope increases the chances for habitability on these planets,” said team member Nikole Lewis of the Space Telescope Science Institute (STScI) in Baltimore. “If they had a significant hydrogen-helium envelope, there is no chance that either one of them could potentially support life because the dense atmosphere would act like a greenhouse.”

Julien de Wit of the Massachusetts Institute of Technology in Cambridge, Massachusetts, led a team of scientists to observe the planets in near-infrared light using Hubble’s Wide Field Camera 3. They used spectroscopy to decode the light and reveal clues to the chemical makeup of an atmosphere. While the content of the atmospheres is unknown and will have to await further observations, the low concentration of hydrogen and helium has scientists excited about the implications.

“These initial Hubble observations are a promising first step in learning more about these nearby worlds, whether they could be rocky like Earth, and whether they could sustain life,” says Geoff Yoder, acting associate administrator for NASA’s Science Mission Directorate in Washington. “This is an exciting time for NASA and exoplanet research.”
Journal Reference:
Julien de Wit, Hannah R. Wakeford, Michaël Gillon, Nikole K. Lewis, Jeff A. Valenti, Brice-Olivier Demory, Adam J. Burgasser, Artem Burdanov, Laetitia Delrez, Emmanuël Jehin, Susan M. Lederer, Didier Queloz, Amaury H. M. J. Triaud, Valérie Van Grootel. A combined transmission spectrum of the Earth-sized exoplanets TRAPPIST-1 b and c. Nature, 2016
http://dx.doi.org/10.1038/nature18641
Using NASA’s Hubble Space Telescope, astronomers have conducted the first search for atmospheres around temperate, Earth-sized planets beyond our solar system and found indications that increase the chances of habitability on two exoplanets.
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Aswin As

Space Exploration  - 
 
Nixon White House speechwriter William Safire drafted this contingency speech for Nixon in an event of Apollo 11 Lunar Module failure. This memo was not revealed until 1999.
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Mike Oswald's profile photoDavid Bussell's profile photo
2 comments
 
Love to be able to read it
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Aidin Ashoori

Space Exploration  - 
 
In situ image of Titan's surface from Huygens
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Erik Palumbo's profile photoKenneth Drexler's profile photo
4 comments
 
Lotta strewn around rocks
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Manjaro Gaming

Space Exploration  - 
 
Who will be first to send Humans to Mars
861 votes  -  votes visible to Public
SpaceX
44%
NASA
49%
Mars one
8%
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Pradeep Somu's profile photo
63 comments
 
I wonder why NASA doesn't try Crowdfunding for Mars missions. Over several years they can gather enough money for a manned mission
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Astronomia e Biologia

Space Exploration  - 
 
VÍDEO NOVO- Deixe o seu like e deixe o seu gostei.

Neste vídeo eu falei sobre o Telescópio Espacial Hubble que fez o seu primeiro estudo sobre a atmosfera de dois exoplanetas (TRAPPIST-1b e TRAPPIST-1c), sendo dois exoplantetas com o tamanho semelhante ao tamanho do planeta Terra. Também falei um pouco desses exoplanetas. Fontes: 1- http://www.nasa.gov/press-release/nasa-s-hubble-telescope-makes-first-atmospheric-study-of-earth-sized-exoplanets 2- http://hubblesite.org/pubinfo/pdf/2016/27/pdf.pdf
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+Astronomia Observacional 
+Sérgio Sancevero 
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Thomas Nitsch's profile photo
 
Und ich hoffe das es auf der Exoplaneten Leben möglich ist das wehre sehr geil gewesen.
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Thorfinn Hrolfsson

Space Exploration  - 
 
Hokkaido University
Scientists at Hokkaido University have revealed temperature-dependent energy-state conversion of molecular hydrogen on ice surfaces, suggesting the need for a reconsideration of molecular evolution theory.

Molecular hydrogen, the most abundant element in space, is created when two hydrogen atoms bond on minute floating ice particles. It has two energy states: ortho and para, depending on the direction of proton spins. Ortho-hydrogen converts to para-hydrogen on extremely low temperature ice particles, though its mechanism remained unclear.

When molecular hydrogen is released from tiny ice particles in space, the particular state of its energy plays a key role in molecular evolution—the process of generating a wide range of molecules over a long period of time in space.
Journal Reference:
Hirokazu Ueta, Naoki Watanabe, Tetsuya Hama, Akira Kouchi. Surface Temperature Dependence of Hydrogen Ortho-Para Conversion on Amorphous Solid Water. Physical Review Letters, 2016; 116 (25)
http://dx.doi.org/10.1103/PhysRevLett.116.253201
Scientists at Hokkaido University have revealed temperature-dependent energy-state conversion of molecular hydrogen on ice surfaces, suggesting the need for a reconsideration of molecular evolution theory. Molecular hydrogen, the most abundant element in space, is created when two hydrogen atoms ...
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B.A. Dilger's profile photo
 
Ice is H2O. For molecular hydrogen to bond, the ice our solar system is abundant in would generate much of this without the sun's fusion? How would heat effect this process? Would it draw the molecular hydrogen inward by centripetal force?
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Gracjan Rötke

Space Exploration  - 
 
Discovery Of Life Outside Solar System In 10 Years?
The discovery of life outside our solar system could be just 10 years away, astronomers have said after they found further evidence suggesting two “precious” exoplanets are similar to Earth. The planets, which orbit a star called Trappist-1 about 39 light-years away, are in the so-called Goldilocks Zone, suggesting the temperature is 'just right' for liquid water to exist – far enough away from the star that it does not evaporate, but close enoug...
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Selvaraj Kandhasamy's profile photo
 
May be not...
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Codex Regius

Space Exploration  - 
 
This is a simulation of what Clyde Tombaugh would have seen on 23 January 1930 if he had a better telescope - say, like the Hubble. ;-) Note that he was looking at the south pole, the part not cartographed by New Horizons, hence, no better resolution is available.
 
This is a simulation of what Clyde Tombaugh would have seen on 23 January 1930 if he had a better telescope - say, like the Hubble. ;-) Note that he was looking at the south pole, the part not cartographed by New Horizons, hence, no better resolution is available.

The image was created with the assistance of Celestia 1.6.1 to accompany our "Pluto & Charon" pictorial volume whose e-book edition - but only the English one! - will be available for free next Saturday and Sunday, 22 and 23 July, from kdp and/or Amazon.

The blog post contains another image showing the positions of Pluto's moons as Tombaugh would have discovered them, had he been able to.

#Pluto #Charon #Newhorizons #NASA #Solarsystem
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Codex Regius

Space Exploration  - 
 
Why is Sputnik Planum exactly facing away from Charon? This third-party article examines Pluto's dynamics and draws the astonishing conclusion that its axis may be unstable, owing to the relative distribution of volatile ices on the surface. So what would actually happen if Sputnik Planum would at times melt up, as we propose in our book? Is it conceivable that on such occasions it might actually "see" Charon rising one day?

http://plutoetcharon.blogspot.si/2016/07/pluto-articles-pluto-follows-its-cold.html


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Thorfinn Hrolfsson

Space Exploration  - 
 
Brown University
Around 3.8 billion years ago, an asteroid more than 150 miles across, roughly equal to the length of New Jersey, slammed into the Moon and created the Imbrium Basin — the right eye of the fabled Man in the Moon. This new size estimate, published in the journal Nature, suggests an Imbrium impactor that was two times larger in diameter and 10 times more massive than previous estimates.
“We show that Imbrium was likely formed by an absolutely enormous object, large enough to be classified as a protoplanet,” said Pete Schultz, professor of earth, environmental and planetary sciences at Brown University. “This is the first estimate for the Imbrium impactor’s size that is based largely on the geological features we see on the Moon.”
Previous estimates, Schultz said, were based solely on computer models and yielded a size estimate of only about 50 miles in diameter.
These new findings help to explain some of the puzzling geological features that surround the Imbrium Basin. The work also suggests — based on the sizes of other impact basins in the Moon, Mars and Mercury — that the early solar system was likely well stocked with protoplanet-sized asteroids.
Imbrium sculpture
The Imbrium Basin — seen from Earth as a dark patch in the northwestern quadrant of the Moon’s face — measures about 750 miles across. The basin is surrounded by grooves and gashes, large enough to be seen with even small telescopes from Earth, created by rocks blasted out of the crater when it was formed. These features, known as the Imbrium Sculpture, radiate out from the center of the basin like spokes on a wheel, but are concentrated on the basin’s southeast side. That suggests that the impactor traveled from the northwest, impacting at an oblique angle rather than straight on.
Journal Reference:
Peter H. Schultz, David A. Crawford. Origin and implications of non-radial Imbrium Sculpture on the Moon. Nature, 2016; 535 (7612): 391
http://dx.doi.org/10.1038/nature18278
PROVIDENCE, R.I. [Brown University] — Around 3.8 billion years ago, an asteroid more than 150 miles across, roughly equal to the length of New Jersey, slammed into the Moon and created the Imbrium Basin — the right eye of the fabled Man in the Moon. This new size estimate, published in the ...
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Mike Davis's profile photo
 
omg :-I
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Steve Sheridan

Space Exploration  - 
 
NASA releases video of a full year of the Earth from the space agency's EPIC camera on NOAA's DSCOVR satellite at Lagrange point 1, approximately 1 million miles from Earth.
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ℒiℓi ℓĭĭ's profile photo
 
<3 <3 <3
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Aidin Ashoori

Space Exploration  - 
 
Enceladus--is the sixth-largest moon of Saturn
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Aidin Ashoori's profile photoMassimo Luciani's profile photo
3 comments
 
What's really important is that Enceladus is one of the best candidates to host life forms.
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Paul and Pierre Doucet

Space Exploration  - 
 
In terms of overcoming obstacles and reaching a goal, perhaps the greatest human achievement.
 
On this day in 1969, Neil Armstrong stepped onto the moon.

“That’s one small step for man, one giant leap for mankind.”
http://on.natgeo.com/29LNW3k
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