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#1876 |
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Quote:
Europa really does have a liquid ocean after all
Just as it was getting dark, I was watching Jupiter climbing from the East, with a telescope. I noticed one of the Moons was very close-in to the planet, and a dark 'spot' on the surface of Jupiter itself - known as a 'shadow transit', when the shadow of one of the moons crosses the face of the planet - when I looked it up, it that moon was Europa. |
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#1877 |
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#1878 |
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Forum Member
Join Date: Nov 2004
Location: Solihull
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Quote:
Europa really does have a liquid ocean after all
Scientists have found the best evidence yet for water just beneath the surface of Jupiter's icy moon, Europa. Analysis of the moon's surface suggests plumes of warmer water well up beneath its icy shell, melting and fracturing the outer layers. The results, published in the journal Nature, predict that small lakes exist only 3km below the crust. http://www.bbc.co.uk/news/science-environment-15754786 http://www.nature.com/nature/journal...ture10608.html Quote:
New Mars rover to be launched on Saturday
The Curiosity rover has 10 science instruments to search for evidence about whether Mars had environments favorable for microbial life, including the chemical ingredients for life. The rover will use a laser to look inside rocks and release their gasses so its spectrometer can analyze and send the data back to Earth. The latest online information on the Mars Science Laboratory mission is at: http://www.nasa.gov/msl . JPL, a division of the California Institute of Technology in Pasadena, manages the mission for NASA. http://mars.jpl.nasa.gov/news/whatsn...ws&NewsID=1187 http://www.bbc.co.uk/programmes/p00lmx11 Quote:
Russian dust collecting probe bites the dust
The Russian space agency has conceded there is now little chance of reviving its Mars mission, Phobos-Grunt. The probe has been stuck circling the Earth since its launch on 9 November, unable to fire the engine that would take it on to the Red Planet. http://www.bbc.co.uk/news/science-environment-15841896 |
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#1879 |
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Can't wait for that probe to go and dive in...
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Funny you should mention Europa tonight.
Just as it was getting dark, I was watching Jupiter climbing from the East, with a telescope. I noticed one of the Moons was very close-in to the planet, and a dark 'spot' on the surface of Jupiter itself - known as a 'shadow transit', when the shadow of one of the moons crosses the face of the planet - when I looked it up, it that moon was Europa. Quote:
I've been convinced there's water on Europa for years. I developed an outline of a sci-fi story along with a friend about humans discovering a very complex environment along with advanced creatures living around geo-thermal vents on the ocean floor. It got very involved in the end. Good tosee our ideas may not have beeen so fanciful after all!
This is a monster of a rover, by far the largest and most complex ever developed. It's the size of an SUV and too large for airbags so NASA have developed a 'sky-crane' landing system. The lander will be slowed by a parachute until it is just above the surface where retro-rockets will fire to slow the lander to a hover. Then the rover will be droped down to the surface on cables. How cool is that! There's a glimmer of hope for Russia's beleagured Mars probe. ESA's radio dish in Australia has picked up some telemetry from the probe as it orbits Earth, raising the chance that communication can be re-established and the probe fixed. There is still a short amount of time for the probe to get on it's way towards Mars before the planet's orbit takes it out of range. As for the Mars ventures, that sky crane is inovative but there's plenty to go wrong with a system like that! l would have thought that they'd have done a parachute & retro rockets landing like the two Viking landers which is a simpler system with less to go wrong.l hope that the Phobos mission can be saved though l suspect that it'll end up as a piece of orbiting junk a bit like Mars 96 http://en.wikipedia.org/wiki/Mars_96 - another success for the Ghoul of Mars! http://www.economist.com/node/1811981The funny thing is that the Soviets/Russians have had much greater success with the far more hostile Venus and yet things haven't worked out for them at Mars. Apparently, some two thirds of all missions to Mars end in failure http://www.newscientist.com/article/...s-on-mars.html. |
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#1880 |
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The funny thing is that the Soviets/Russians have had much greater success with the far more hostile Venus and yet things haven't worked out for them at Mars. Apparently, some two thirds of all missions to Mars end in failure http://www.newscientist.com/article/...s-on-mars.html.
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#1881 |
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Well guys, the potentially good news is that there are tentative plans for an ESA/NASA Europa orbiter http://en.wikipedia.org/wiki/Jupiter_Europa_Orbiter to further study this world but there'll be no landing/drilling probe it seems. l hope that this project is confirmed in due course.
As for the Mars ventures, that sky crane is inovative but there's plenty to go wrong with a system like that! l would have thought that they'd have done a parachute & retro rockets landing like the two Viking landers which is a simpler system with less to go wrong.l hope that the Phobos mission can be saved though l suspect that it'll end up as a piece of orbiting junk a bit like Mars 96 http://en.wikipedia.org/wiki/Mars_96 - another success for the Ghoul of Mars! http://www.economist.com/node/1811981The funny thing is that the Soviets/Russians have had much greater success with the far more hostile Venus and yet things haven't worked out for them at Mars. Apparently, some two thirds of all missions to Mars end in failure http://www.newscientist.com/article/...s-on-mars.html. I think the reason why so many Martian probes fail is because it is seen as the easiest destination. Mission designers therefore develop much more complex landers and probes which they'd never consider for other planets. There's a combination of complexity leading to things going wrong and lack of attention becaue it's deemd and 'easy' mission (comparatively). 33% success is still terrible, though. |
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#1882 |
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Yes that's quite odd really. They had excellent pictures back from the surface of Venus in the early 70s.
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#1883 |
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Join Date: Nov 2008
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I don't believe it!
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#1884 |
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Water, water everywhere...
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#1885 |
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Just uner 3 hours until lift off of the Mars Science Laboratory/Curiosity Rover at 3:02pm GMT today.
http://www.ustream.tv/nasahdtv http://www.nasa.gov/multimedia/nasatv/index.html |
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#1886 |
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When I look at Jupiter with my new 23 x 70 bins, all I see is a very bright light. I can see the moons though.
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#1887 |
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Join Date: Jun 2006
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Mars probe due away very soon.
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#1888 |
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Join Date: Jun 2006
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4 minutes to launch.
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#1889 |
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T-Minus 4:00
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#1890 |
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Bon voyage!
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#1891 |
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Less than 2 minutes to go now! http://www.nasa.gov/multimedia/nasatv/index.html
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#1892 |
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Join Date: Jul 2009
Location: Taedet animam meam vitae
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I watched the launch on NasaTV and it was amazing.
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#1893 |
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Join Date: Sep 2011
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I just hope the new fangled sky-crane works correctly. It's a hell of a gamble to take with one of the most important missions to Mars ever.
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#1894 |
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That was one of the smoothest launches I've ever seen! Bon voyage Mars lab
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#1895 |
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Spacecraft now on its way to Mars.
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#1896 |
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The DSN in Canberra has picked up the signal from the spacecraft, officialy on its way !!
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#1897 |
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Bet the Russians are currently drowning their sorrows.
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#1898 |
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Quote:
I just hope the new fangled sky-crane works correctly. It's a hell of a gamble to take with one of the most important missions to Mars ever.
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#1899 |
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anything that lands on Mars will "go wrong" shortly after landing
it doesn't really, but they need to suppress the truth about Cydonia. Just wait and see. |
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#1900 |
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There was a good article in New Scientist a couple of weeks ago which explained the reasoning behind the Sky Crane. I think basically because of the sheer size (and therefore momentum) of the lander making a hard landing with retro-rockets carries a sizeable risk as there is little margin for error. Using the rockets to get the lander into a hover is slightly safer as they have a certain margin of error to play with in the altitude for the hover. It's not much but I guess NASA deemed it necessary. What is interesting is that using the combination of techniques to get the lander to the ground allows for a much more accurate landing (it is hoped) - something like plus or minus 6km rather than the usual 20km+. So this lander is aimed right in the middle of a crater which would never have been considered before.
I think the reason why so many Martian probes fail is because it is seen as the easiest destination. Mission designers therefore develop much more complex landers and probes which they'd never consider for other planets. There's a combination of complexity leading to things going wrong and lack of attention becaue it's deemd and 'easy' mission (comparatively). 33% success is still terrible, though. Quote:
I just hope the new fangled sky-crane works correctly. It's a hell of a gamble to take with one of the most important missions to Mars ever.
Quote:
anything that lands on Mars will "go wrong" shortly after landing
it doesn't really, but they need to suppress the truth about Cydonia. Just wait and see. Quote:
When I look at Jupiter with my new 23 x 70 bins, all I see is a very bright light. I can see the moons though.
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l would have thought that they'd have done a parachute & retro rockets landing like the two Viking landers which is a simpler system with less to go wrong.