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pacome delva

The Mysterious Molasses Markings of Pluto - 0 views

science.nasa.gov/...14apr_molasses

astrophysics dwarf_planet pluto atmosphere

shared by pacome delva on 23 Apr 10 - Cached
  • Pluto can get so cold, researchers believe, that its atmosphere can actually freeze and fall to the ground. If Earth's atmosphere did that, it would make a layer 30 feet thick, but Pluto has less to work with. When it’s on the ground, Pluto's entire blanket of air is no more than a frosty film of nitrogen and methane.
pacome delva

Mapping Turbulence in the Solar Wind - 0 views

focus.aps.org/st16

phy astrophysics solar_wind formation_flying turbulence

shared by pacome delva on 03 May 10 - Cached
  • a team reports studying the turbulent flow of solar wind particles by monitoring the accompanying waves of magnetic field. The team used a cluster of satellites to measure the field in unprecedented spatial detail. They found that the waves aren't equally strong in all directions but are larger in certain preferred directions, as theorists had predicted. The observation will help astrophysicists better understand the consequences of the solar wind, including its effect on the transmission of cosmic rays, particles that arrive at Earth from elsewhere in our galaxy.
pacome delva

Dark matter 'no result' comes under fire - 3 views

physicsworld.com/...42554

phy astrophysics dark_matter controversy

shared by pacome delva on 07 May 10 - Cached
  • On Monday the XENON100 collaboration published an analysis of the first experimental results from its dark-matter detector. It reported no evidence of dark matter, the substance thought to constitute over 80% of mass in the universe. The experiment covered a similar parameter range as dark-matter searches DAMA and CoGeNT, which have previously claimed possible evidence for dark matter. As a result, the XENON100 team concluded that both the DAMA and CoGeNT evidence could be excluded. But now the DAMA and CoGeNT collaborations claim that the XENON100 researchers' analysis is flawed, and that their original evidence for dark matter should remain intact
Francesco Biscani

BBC NEWS | Science & Environment | Herschel yields new galaxy image - 0 views

news.bbc.co.uk/...8127798.stm

astronomy astrophysics herschel

shared by Francesco Biscani on 01 Jul 09 - Cached
  • Francesco Biscani on 01 Jul 09
     
    More Herschel images coming.
ESA ACT

NASA - The Surprising Shape of Solar Storms - 0 views

science.nasa.gov/...14apr_3dcme.htm

astrophysics sun space_weather

shared by ESA ACT on 24 Apr 09 - Cached
  • ESA ACT on 24 Apr 09
     
    A space croissant for breakfast ?
pacome delva

Milky Way Grew by Swallowing Other Galaxies - 0 views

sciencenow.sciencemag.org/...2

phy astrophysics globular_clusters

shared by pacome delva on 26 Nov 09 - Cached
  • pacome delva on 26 Nov 09
     
    Globular clusters in our galaxy would be the remnants of dwarf galaxies eaten by our galaxy the milky way ! This assumption is quite revolutionary and would support an accretion model of the universe rather than the formation of huge galaxies. So what about the formation of giant black holes in the center of galaxies...?
Luís F. Simões

Pioneer Anomaly Solved By 1970s Computer Graphics Technique - Technology Review - 4 views

www.technologyreview.com/...26589

pioneer anomaly PHY astrophysics

shared by Luís F. Simões on 31 Mar 11 - No Cached
Nicholas Lan liked it
  • Now Frederico Francisco at the Instituto de Plasmas e Fusao Nuclear in Lisbon Portugal, and a few pals, say they've worked out where the thermal calculations went wrong. These guys have redone the calculations using a computer model of not only how the heat is emitted but how it is reflected off the various parts of the spacecraft too. The reflections turn out to be crucial.
  • Ref: arxiv.org/abs/1103.5222: Modelling The Reflective Thermal Contribution To The Acceleration Of The Pioneer Spacecraft
  • santecarloni on 01 Apr 11
     
    This is really cool. I know one of the authors and he is a good guy... the only thing that leaves me unsatisfied is that if the whole issue is related to thermal effects one should have seen the Pioneer effect all the time and not only at about 10 AU... ...or is there some thermal process that kicked in only at this distance?
  • Luís F. Simões on 26 Jul 11
     
    Here's an update on this theory: NASA Releases New Pioneer Anomaly Analysis "The mysterious force acting on the Pioneer spacecraft seems to be falling exponentially. That's a strong clue that on-board heat is to blame, says NASA." Heat emission 'most likely cause' of pioneer anomaly "What's more interesting is that, contrary to the original analysis conducted all those years ago, the deceleration does seem to be decelerating at an exponential rate -- just as one might expect from the radioactive decay of plutonium-238, which powers the two spacecraft. Turyshev concludes, "The most likely cause of the Pioneer anomaly is the anisotropic emission of on-board heat.""
johannessimon81

How Building a Black Hole for Interstellar Led to an Amazing Scientific Discovery | WIRED - 2 views

www.wired.com/...hysics-interstellar-black-hole

science PHY space black_hole

shared by johannessimon81 on 26 Oct 14 - No Cached
  • johannessimon81 on 26 Oct 14
     
    Kip Thorne looks into the black hole he helped create and thinks, "Why, of course. That's what it would do." This particular black hole is a simulation of unprecedented accuracy. It appears to spin at nearly the speed of light, dragging bits of the universe along with it.
Dario Izzo

GalaxyGAN: Generative Adversarial Networks recover features in astrophysical images of ... - 0 views

space.ml/GalaxyGAN

shared by Dario Izzo on 30 Jan 18 - No Cached
  • Dario Izzo on 30 Jan 18
     
    Deconvnets for astro images .... resolving galxies :)
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