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LeopoldS

GTOC problem announced! - 0 views

"This year's problem is the global mapping of Jupiter's Galilean satellites, Io, Europa, Ganymede, and Callisto, by means of close flybys. A trajectory must be designed for a low-thrust spacecraft ...

Mas ai

started by LeopoldS on 10 Sep 12 no follow-up yet
Marion Nachon

NASA Spacecraft Data Suggest Water Flowing on Mars - 2 views

www.jpl.nasa.gov/...news.cfm

Science Climate

shared by Marion Nachon on 14 Jan 12 - No Cached
LeopoldS liked it
  • Marion Nachon on 14 Jan 12
     
    HIRISE (High Resolution Imaging Science Experiment) images show flows lengthen and darken on rocky equator-facing slopes from late spring to early fall. The seasonality, latitude distribution and brightness changes suggest a volatile material is involved, but there is no direct detection of one.
Tom Gheysens

Fur and feathers keep animals warm by scattering light - 1 views

www.sciencedaily.com/...140123125834.htm

BIO science light fur

shared by Tom Gheysens on 24 Jan 14 - No Cached
  • Tom Gheysens on 24 Jan 14
     
    In work that has major implications for improving the performance of building insulation, scientists at the University of Namur in Belgium and the University of Hassan I in Morocco have calculated that hairs that reflect infrared light may contribute significant insulating power to the exceptionally warm winter coats of polar bears and other animals.
  • Paul N on 25 Jan 14
     
    That's quite interesting. Maybe the future of buildings and spacecraft is furry?
Luís F. Simões

Mars Code | Communications of the ACM - 1 views

cacm.acm.org/...fulltext

INF software redundancy fault detection model checking Curiosity Mars

shared by Luís F. Simões on 12 Mar 14 - No Cached
  • As can be expected, all functions on the rover, and on the spacecraft that brought it to its destination 350 million miles from Earth, are controlled by software. This article discusses some of the precautions the JPL flight software team took to improve its reliability.
  • Luís F. Simões on 12 Mar 14
     
    Interesting read if you're interested on the kind of coding that goes into something like the Curiosity rover. :) btw.. nice fill-packet being sent by Curiosity: "Elvis has Spirit. The answer is 42....END\r\n"
annaheffernan

Initial problems with first space toilets revealed :) - 1 views

www.huffingtonpost.com/...asa-transcripts_n_3054324.html

fun

shared by annaheffernan on 27 Sep 13 - No Cached
  • annaheffernan on 27 Sep 13
     
    On a lighter note: Decades after NASA's Apollo missions, people are having some laughs over transcripts of astronauts' humorous conversations aboard the spacecraft. For all their technological sophistication, the Apollo command module had a relatively primitive system for managing human waste.
Thijs Versloot

First images of comet #ISON by mars orbiter, #SOHO spacecraft getting ready - 0 views

www.planetary.org/...rs-reconnaissance-orbiter.html

space comets

shared by Thijs Versloot on 04 Oct 13 - No Cached
  • Thijs Versloot on 04 Oct 13
     
    With its exceeding small perihelion (passing the 28th of nov), there is an off chance that it will be visible by the naked eye in the nights sky around the 10th of november http://www.universetoday.com/102976/will-comet-ison-dazzle-our-skies-an-expert-weighs-in/
LeopoldS

Description of Tersicoccus phoenicis gen. nov., sp. nov. isolated from spacecraft assem... - 0 views

ijs.sgmjournals.org/...2463.abstract

planetary protection BIO

shared by LeopoldS on 02 Dec 13 - No Cached
  • LeopoldS on 02 Dec 13
     
    bacteria apparently specialised in space clean rooms ...
  • Thijs Versloot on 03 Dec 13
     
    I'm trying to read the abstract, but I simply can't manage...
johannessimon81

Bill Nye - The Science Guy on Jupiter and the Juno spacecraft - 0 views

www.youtube.com/watch

science education

shared by johannessimon81 on 19 Oct 13 - No Cached
  • johannessimon81 on 19 Oct 13
     
    Great explanations of space stuff for people who are not experts (for example children) :-)
Thijs Versloot

The SupraThermal Ion Monitor for space weather predictions - 4 views

scitation.aip.org/...1.4873327

cubesat sun spaceweather

shared by Thijs Versloot on 05 May 14 - No Cached
  • Thijs Versloot on 05 May 14
     
    The novel part here is that it can be scaled down to the cubesat platform. I then wondered, could we place multiple of such Cubesats in a 'decaying orbit' around the Sun? Fractionated will give spatial and temporal information which, even with a simple langmuir probe setup, can give information on density, temperature, velocity, ion energy distribution, potential.. Of course they will be lost relatively quickly, but more could be ejected from a mother ship which is orbiting at a safer distance.
  • Thijs Versloot on 08 May 14
     
    For example like the KickSat projec https://www.kickstarter.com/projects/zacinaction/kicksat-your-personal-spacecraft-in-space Although a pc-reboot due to a radiation event in the electronics has reset the deployment timeline to approximately 2 days after re-entry... http://www.huffingtonpost.co.uk/2014/05/06/kicksat-satellites_n_5273821.html
Thijs Versloot

Magnetic bubble may give space probes a soft landing - 4 views

www.newscientist.com/article/mg22329763.100-magnetic-bubble-may-give-space-probes-a-soft-landing.html?cmpid=RSS|NSNS|2012-GLOBAL|physics-math#.U7aeTnWSzmE

magnetoshell aerocapture plasma entry

shared by Thijs Versloot on 04 Jul 14 - No Cached
  • Thijs Versloot on 04 Jul 14
     
    I am also looking into this idea since some time and it seems NASA is already ahead, awarding two contract to investigate magnetoshell aerocapture. This could be interesting for probes that want to enter eg Marsian atmospheres at relatively high velocity. Or for multiple re-entry s/c at Earth. The idea of the experiment, The satellite will carry a copper coil, powered by a lithium-ion battery, that generates a magnetic field around the probe. As it descends, the spacecraft will eject a small amount of plasma. This gets trapped in the magnetic field, creating a protective bubble that stops air molecules colliding with the craft and producing heat.
  • LeopoldS on 05 Jul 14
     
    A few years back Mimmo has worked on this, rather from the theory side if I remember well ...
  • Paul N on 11 Jul 14
     
    The power requirements for such a thing must be HUGE!
Nina Nadine Ridder

Testing shows using microwaves to propel a craft into space might work - 4 views

phys.org/...owaves-propel-craft-space.html

technology propulsion microwaves science

shared by Nina Nadine Ridder on 23 Jul 15 - No Cached
Thijs Versloot and jcunha liked it
  • Nina Nadine Ridder on 23 Jul 15
     
    A team of researchers at Colorado based Escape Dynamics is reporting that initial tests indicate that it might really be possible to launch space-planes into space using microwaves sent from the ground, to allow for a single stage spacecraft. If the idea pans out, the cost savings for sending satellites (or perhaps humans) into orbit could be considerable.
  • Thijs Versloot on 27 Jul 15
     
    Not very new, but a very slick video nonetheless! Will it work? I am not so sure whether "just engineering" applies in this case. The array of antenna's required is quite significant to compensate for beam losses. Wall plug efficiency is not that high therefore, then again.. solar energy is for free almost in the future so who cares.. let's go for it! :)
pacome delva

Radiation fears stalk stellar mission - 0 views

physicsworld.com/...43063

space_mission GAIA solar_radiation

shared by pacome delva on 05 Jul 10 - Cached
  • Concern over ESA's handling of the radiation issue caused Michael Perryman, former GAIA project scientist, to resign from the agency in 2008. But GAIA science-team member Lennart Lindegren, an astronomer at Lund Observatory in Sweden, is confident that GAIA's unprecedented accuracy will be feasible. GAIA researchers will continue to perform tests and calibrations until at least 2011, which will include irradiating the CCDs at space-like temperatures. Lindegren admits, however, that they can never be certain of success until the spacecraft is in orbit and starts sending back data.
  • pacome delva on 05 Jul 10
     
    metamaterials to stop radiations?
  • LeopoldS on 05 Jul 10
     
    hmm ... in the optical range it is already a bit tricky .... lets brainstorm a bit about it ... anything in the literature? Luzi?
  • pacome delva on 06 Jul 10
     
    the components of the metamaterial need to have a size inversely proportional to the wavelenght, but here we are talking about high energy protons. So the idea was: is there metamaterials that change the electrical properties to solve this problem of holes in the material... but i dont have a clue !
Juxi Leitner

Lotus Plant-Inspired Dust-Busting Shield To Protect Space Gear - 3 views

www.space-travel.com/...To_Protect_Space_Gear_999.html

technology bio spacecraft dust shielding

shared by Juxi Leitner on 29 Sep 09 - Cached
  • replicate to prevent dirt from accumulating on the surfaces of spacesuits, scientific instruments, robotic rovers, solar array panels and other hardware used to gather scientific data or carry out exploratory activities on other objects in the solar system
  • The team also is trying to partner with Northrop Grumman to add a biocide to the coating, which would kill bacteria that thrive and produce foul odors wherever people are confined to a small space for long periods, like the space station.
  • Tobias Seidl on 04 Oct 09
     
    We had some discussion about the Lotus-effect roughly two years ago. Zoe said that NASA surely worked on it. Well, she was right.
Joris _

ATK Proposes Satellite To Fight Space Debris | SpaceNews.com - 0 views

spacenews.com/...ellite-fight-space-debris.html

MAD debris

shared by Joris _ on 10 Aug 10 - Cached
  • The goal is to turn large debris particles that pose a threat to spacecraft into much smaller pieces that can be deflected by exterior shielding.
pacome delva

Students Record Spellbinding Video of Disintegrating Spacecraft - 1 views

science.nasa.gov/...25jun_hayabusa

space

shared by pacome delva on 22 Jul 10 - Cached
  • pacome delva on 22 Jul 10
     
    cool the video!
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