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MahFL
Posted on: Jan 27 2015, 03:58 PM


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Less than 200 million km to go.

New Horizons is now 199944087 kilometers away from Pluto.

http://www.yaohua2000.org/cgi-bin/New%20Horizons.pl
  Forum: New Horizons · Post Preview: #217412 · Replies: 116 · Views: 177027

MahFL
Posted on: Jan 27 2015, 12:24 PM


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They could try a hop first, the person who designed the landing gear says it can make the lander hop, if they have power of course. Also it could flip it onto it's back too...... unsure.gif
  Forum: Rosetta · Post Preview: #217404 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Jan 16 2015, 11:26 PM


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New Horizons is now 212778450 kilometers away from Pluto, from yaohua website.

http://www.yaohua2000.org/cgi-bin/New%20Horizons.pl
  Forum: New Horizons · Post Preview: #217083 · Replies: 116 · Views: 177027

MahFL
Posted on: Jan 16 2015, 03:49 PM


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Looks to me the main jet is made up of about 14 jets all combining together, awesome.
  Forum: Rosetta · Post Preview: #217053 · Replies: 390 · Views: 451387

MahFL
Posted on: Jan 12 2015, 03:11 PM


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http://news.yahoo.com/pilot-killed-small-p...-003820594.html
  Forum: MSL · Post Preview: #216912 · Replies: 1 · Views: 6626

MahFL
Posted on: Dec 29 2014, 12:25 PM


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QUOTE (djellison @ Dec 29 2014, 03:47 AM) *
... "A straight shot with abrupt braking at Mars takes about six months whereas a trip relying on ballistic capture would take an additional several months" are at odds with one another..."


I think they are not considering the insertion burn as part of the cruise. Also of course you have several extra months of cruise time which has to be "manned" back on Earth, which also costs money.
Also a longer cruise time could mean more time for a failure to occur.
  Forum: Mars · Post Preview: #216646 · Replies: 5 · Views: 15641

MahFL
Posted on: Dec 22 2014, 03:32 PM


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QUOTE (fredk @ Dec 22 2014, 03:20 PM) *
...with apparently only two legs in contact with the ground/cliff surface.


The SESAME team poster presentation said all three feet were touching the surface, with one leg likely touching the side of the rock or rock face they are leaning against. All 3 sensors recorded MUPUS trying to hammer it's self into the ground, and to do that they have to be touching the ground.
  Forum: Rosetta · Post Preview: #216547 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Dec 22 2014, 02:16 PM


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QUOTE (fredk @ Dec 22 2014, 12:03 AM) *
If I remember correctly such a maneuver was also done with the legs?


I am pretty sure the leg raising was not attempted as they decided to use the power needed for that to do science and they did not know fully at the time what the lander orientation was. The body was rotated.
  Forum: Rosetta · Post Preview: #216544 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Dec 19 2014, 10:25 PM


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Quick summary of the French news conference is that Philae has enough power now to keep himself alive, one leg is likely firmly anchored, and the cliff shadow could actually help him operate longer up to and maybe including closest approach to the Sun.
  Forum: Rosetta · Post Preview: #216482 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Dec 19 2014, 11:20 AM


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What a cool view, can't recall seeing one the same.

  Forum: MSL · Post Preview: #216457 · Replies: 546 · Views: 439254

MahFL
Posted on: Dec 17 2014, 12:40 PM


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Farewell VEX smile.gif .
  Forum: Venus Express · Post Preview: #216390 · Replies: 500 · Views: 1360584

MahFL
Posted on: Dec 12 2014, 01:32 PM


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QUOTE (jmknapp @ Dec 12 2014, 11:54 AM) *
Yet these aeolian deposits would have to build up the peak of Mt. Sharp while not filling in the moat. Maybe your radial winds would do it.
... were they necessarily a product of standing or running water?


There are well known ways of determining if rocks were laid down in running or standing water, the cross bedding.
Don't winds curve upwards when entering a depression or crater, becoming weaker at the center, leaving a mound ?




  Forum: MSL · Post Preview: #216253 · Replies: 546 · Views: 439254

MahFL
Posted on: Dec 11 2014, 11:16 AM


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QUOTE (ngunn @ Dec 10 2014, 11:51 PM) *
OK, I'm not averse to an ocean, but then why call this a lake? Wouldn't it be more of a bay? Either way there's a heck of a lot of sediment to remove by wind erosion. Where's it all gone?


Blowing in the wind, for a couple of billion years.
  Forum: MSL · Post Preview: #216215 · Replies: 546 · Views: 439254

MahFL
Posted on: Dec 10 2014, 04:12 PM


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QUOTE (jmknapp @ Dec 10 2014, 02:47 PM) *
It's hard to imagine the crater filling up with level sediments and then eroding out in a moat pattern leaving "Mount Sharp" in the middle. So is the peak of Mt. Sharp actually below the crater rim?


Remember the crater rim would be eroded, by all the rainfall.
  Forum: MSL · Post Preview: #216183 · Replies: 546 · Views: 439254

MahFL
Posted on: Nov 23 2014, 08:18 PM


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I thought the movie was pretty good.
  Forum: Rosetta · Post Preview: #215672 · Replies: 5 · Views: 22748

MahFL
Posted on: Nov 21 2014, 05:24 PM


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New ROLIS 3d image released.

http://www.esa.int/spaceinimages/Images/20...ent_image_in_3D
  Forum: Rosetta · Post Preview: #215610 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Nov 20 2014, 03:14 PM


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QUOTE (Norm Hartnett @ Nov 20 2014, 02:22 PM) *
Do we know if out gassing can cause alterations of the spin axis and rate of spin as the comet approaches perihelion?


Possibly :

"Evidence is found that the rotation rate of 67P has significantly changed near the time of its 2009 perihelion passage, probably due to sublimation-induced torque."

https://hal.archives-ouvertes.fr/hal-01065970
  Forum: Rosetta · Post Preview: #215568 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Nov 19 2014, 06:27 PM


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This sounds promising :

"...As the lander appears to be currently shielded by walls, the local temperature may be lower than it would have been at the chosen landing site. So if Philae wakes up, it might remain operative much longer than expected, possibly until perihelion, which is extremely exciting."

http://blogs.esa.int/rosetta/2014/11/19/di...rill-the-comet/
  Forum: Rosetta · Post Preview: #215530 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Nov 19 2014, 06:23 PM


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Has the surface temperature of a comet been measured as it nears the Sun ?, similar to 67P's orbit ?
  Forum: Rosetta · Post Preview: #215528 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Nov 17 2014, 03:48 PM


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QUOTE (lunaitesrock @ Nov 17 2014, 04:19 PM) *
I don't know what the ground clearance is, but it doesn't look like much.


The gear is designed to flex, remember the impact would have been really gentle, so even if the body made impact no damage would be likely.
  Forum: Rosetta · Post Preview: #215427 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Nov 17 2014, 03:45 PM


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QUOTE (jmknapp @ Nov 17 2014, 03:36 PM) *
So is Philae at rest at 15:43 in the latest image, or still going? Here's the 15:43 location in wider context (red dot):


No, it's still flying.
  Forum: Rosetta · Post Preview: #215426 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Nov 17 2014, 11:37 AM


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ADMIN EDIT: Unnecessary quoting removed. Please be mindful of rule 3.5

The main Solar Panel lady said it takes 5 or 6 hours to warm the battery up to 0C, so right now the battery won't even be close to being warm enough to be charged up. The hope is as the comet gets closer to the Sun the amount of warming the battery needs will be less. The main reason the lander would have failed would be over heating as the comet gets closer to the Sun, but as we know it's in a shady spot.
  Forum: Rosetta · Post Preview: #215411 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Nov 15 2014, 12:29 AM


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If the panorama had been within minutes of touch down the pics would have been a lot different !
  Forum: Rosetta · Post Preview: #215307 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Nov 14 2014, 03:22 PM


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Philae is drilling, from twitter. ohmy.gif
  Forum: Rosetta · Post Preview: #215211 · Replies: 1412 · Views: 1230866

MahFL
Posted on: Nov 14 2014, 02:51 PM


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Oh darn it takes 5 or 6 hours of sunlight just to warm the battery up to 0C, so there is pretty much zero chance of any battery power for even transmissions. Until of course the comet heats up.
  Forum: Rosetta · Post Preview: #215207 · Replies: 1412 · Views: 1230866

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