Mission: Hayabusa 2 |
Mission: Hayabusa 2 |
Jan 22 2008, 02:59 PM
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#101
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Junior Member Group: Members Posts: 58 Joined: 17-September 06 Member No.: 1150 |
JAXA wants to continue with Hayabusa 2. However there is/was a huge fight about the budget. Main problem was the budget for the launch vehicle. 2 months ago or so there was a report which said, that JAXA had to find another launch vehicle or the project gets cancelled. Now the Italian space agency played saviour and overed the VEGA. So finally we might see another Hayabusa in 2011.
It was mentioned here: http://www.jspec.jaxa.jp/080110Final_IPEWG-ProgramBook.pdf |
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Nov 29 2014, 10:49 AM
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#102
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
and don't forget Main Belt Comets, or damocloids. not to mention the probable presence of water ice on the surface of Ceres, or the discovery of refractory materials in the samples from comet Wild 2.
it is becoming more and more clear that the difference between comets and asteroids is not as clear cut as it seemed up to 20 years ago, and that there is actually a sort of continuum between the two |
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Nov 29 2014, 12:58 PM
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#103
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Member Group: Members Posts: 817 Joined: 17-April 10 From: Kamakura, Japan Member No.: 5323 |
and don't forget Main Belt Comets, or damocloids. not to mention the probable presence of water ice on the surface of Ceres, or the discovery of refractory materials in the samples from comet Wild 2. it is becoming more and more clear that the difference between comets and asteroids is not as clear cut as it seemed up to 20 years ago, and that there is actually a sort of continuum between the two Thanks, Paolo for making me aware of icy asteroids and metal asteroids. To me, metals are easier to understand as they are elements. Since our Sun is the only fusing body yet to explode our solar system's metal asteroids (raw materials, at least) must have come from inter galactic space (presumably as gaseous metals). However, water is not an element and that makes me feel uneasy. Can water be produced locally inside our solar system? Or, did water also come from outside? Do we know at all? P |
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Nov 29 2014, 02:22 PM
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#104
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Junior Member Group: Members Posts: 78 Joined: 20-September 14 Member No.: 7261 |
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Nov 30 2014, 12:35 AM
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#105
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Member Group: Members Posts: 817 Joined: 17-April 10 From: Kamakura, Japan Member No.: 5323 |
Those approximately 1900 yottagramm of iron beneath our feet would disagree with you there. Thank you. Yes, I should not be going too far back in time under this category here. It is the festive season affectimg me, I think. However, I would like to believe that there are non recycled metals still left over from the early formation of our solar system and that metalic objects are out there somewhere, formed not just from mantle stripping. P |
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Nov 30 2014, 09:40 PM
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#106
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Member Group: Members Posts: 495 Joined: 12-February 12 Member No.: 6336 |
However, I would like to believe that there are non recycled metals still left over from the early formation of our solar system and that metalic objects are out there somewhere, formed not just from mantle stripping. P Hello there pandaneko Well our current thinking is that nearly all materials that makes up the planets, moons and asteroids originated in a supernova long ago and got very much processed in the early accretion disk and subsequent collisions between objects both large and small. So most materials is thought to have been quite reprocessed in the early age of the solar system. The Sun have contributed very little, like the helium on the surface of the Moon. You might get your wish for metallic objects though, if you don't mind the size, meaning interstellar dust grains. |
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Dec 2 2014, 12:36 PM
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#107
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Member Group: Members Posts: 817 Joined: 17-April 10 From: Kamakura, Japan Member No.: 5323 |
very much processed in the early accretion disk and subsequent collisions between objects both large and small. You might get your wish for metallic objects though, if you don't mind the size, meaning interstellar dust grains. Thank you. This is really sinking into me, particularly "early processing" bit. I wonder then if new arrivals are either too energetic to be caught by our solar system, or our solar system is now too transparent (probably same thing?) for them to accumulate here to form anything larger than grains? Thank you, anyway. On a seperate matter, because I started my thinking about the teeth I now wish to go back there. One of the advantages of being an amateur is wild imagination, I think, particularly in view of the festive season. If evidence for water has been found then there must be water on that asteroid. On the other hand it is difficult to imagine that there are ponds of 20m, 30m across on a small 900m asteroid. My guess is that the asteroid is covered by frost (not smooth ice), all over. No loose pebbles or anything of that kind. I want to see the pictures!!! P |
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