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Author Topic:   Touchdown on Titan!
RAZD
Member (Idle past 1405 days)
Posts: 20714
From: the other end of the sidewalk
Joined: 03-14-2004


Message 16 of 28 (177351)
01-15-2005 9:17 PM


I just hope ...
... that baby can float when the tide comes in.
anybody know if they planned for a liquid landing?
yep http://www.nasa.gov/...5304main_Huygens_onto_Sea_320x240.mov
but now that it is open what happens?
This message has been edited by RAZD, 01-15-2005 21:20 AM

we are limited in our ability to understand
by our ability to understand
RebelAAmerican.Zen[Deist
{{{Buddha walks off laughing with joy}}}

Replies to this message:
 Message 17 by jar, posted 01-15-2005 9:26 PM RAZD has replied

  
jar
Member (Idle past 394 days)
Posts: 34026
From: Texas!!
Joined: 04-20-2004


Message 17 of 28 (177354)
01-15-2005 9:26 PM
Reply to: Message 16 by RAZD
01-15-2005 9:17 PM


Re: I just hope ...
Yes they did. It was desgined to be self righting in liquid. In fact, a liquid landing would have been surer. In a land landing there was no assurance that it would be able to orient its antennas properly.
In addition, many of the experiments work better if they could sample a liquid medium.

Aslan is not a Tame Lion

This message is a reply to:
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Replies to this message:
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Sylas
Member (Idle past 5260 days)
Posts: 766
From: Newcastle, Australia
Joined: 11-17-2002


Message 18 of 28 (177359)
01-15-2005 9:50 PM


That's all folks
The probe on Titan is not a rover, and could only operate as long as it had battery power. It lasted for about 90 minutes, which is a spectacular effort. There will be no more data transmitted from the surface, but no doubt people will be busy with has been found now for years to come. Bravo Huygens, and RIP.

Replies to this message:
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RAZD
Member (Idle past 1405 days)
Posts: 20714
From: the other end of the sidewalk
Joined: 03-14-2004


Message 19 of 28 (177367)
01-15-2005 10:20 PM
Reply to: Message 17 by jar
01-15-2005 9:26 PM


Re: I just hope ...
looks to me like they were only 8 ft (2.4m) short ...
and they said something about erosion around the nearer rocks (like the one with a "4" on it) and that made me think about tides ... you would think that Saturn would cause significant tides on titan eh?

we are limited in our ability to understand
by our ability to understand
RebelAAmerican.Zen[Deist
{{{Buddha walks off laughing with joy}}}

This message is a reply to:
 Message 17 by jar, posted 01-15-2005 9:26 PM jar has replied

Replies to this message:
 Message 20 by jar, posted 01-15-2005 10:22 PM RAZD has replied

  
jar
Member (Idle past 394 days)
Posts: 34026
From: Texas!!
Joined: 04-20-2004


Message 20 of 28 (177368)
01-15-2005 10:22 PM
Reply to: Message 19 by RAZD
01-15-2005 10:20 PM


Re: I just hope ...
Well, next time maybe.

Aslan is not a Tame Lion

This message is a reply to:
 Message 19 by RAZD, posted 01-15-2005 10:20 PM RAZD has replied

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RAZD
Member (Idle past 1405 days)
Posts: 20714
From: the other end of the sidewalk
Joined: 03-14-2004


Message 21 of 28 (177374)
01-15-2005 10:33 PM
Reply to: Message 20 by jar
01-15-2005 10:22 PM


Re: I just hope ...
next time maybe they can use fuel cells for power that access the atmosphere ... or the liquid?

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DBlevins
Member (Idle past 3776 days)
Posts: 652
From: Puyallup, WA.
Joined: 02-04-2003


Message 22 of 28 (177442)
01-16-2005 1:01 AM
Reply to: Message 18 by Sylas
01-15-2005 9:50 PM


Re: That's all folks
That is spectacular considering it was only designed to last a few minutes after touchdown.

This message is a reply to:
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coffee_addict
Member (Idle past 477 days)
Posts: 3645
From: Indianapolis, IN
Joined: 03-29-2004


Message 23 of 28 (177468)
01-16-2005 3:16 AM
Reply to: Message 22 by DBlevins
01-16-2005 1:01 AM


Re: That's all folks
I seem to remember that the science channel said that it was designed to work for about 3 hours or so on the surface.

Here is something to relieve stress.
a + b = t
(a + b)(a - b) = t(a - b)
a - b = at - bt
a - at = b - bt
a - at + t/4 = b - bt + t/4
(a - t/2) = (b - t/2)
a - t/2 = b - t/2
a = b
Since all numbers are the same, math is useless.

This message is a reply to:
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Rrhain
Member
Posts: 6351
From: San Diego, CA, USA
Joined: 05-03-2003


Message 24 of 28 (177478)
01-16-2005 5:43 AM
Reply to: Message 23 by coffee_addict
01-16-2005 3:16 AM


Re: That's all folks
Jacen writes:
quote:
a + b = t
(a + b)(a - b) = t(a - b)
a - b = at - bt
a - at = b - bt
a - at + t/4 = b - bt + t/4
(a - t/2) = (b - t/2)
a - t/2 = b - t/2
a = b
That's a new one I hadn't seen. Problem is in the next-to-last step, of course (due to the nature of squaring), but it's a good one. I'll have to try and remember it.

Rrhain
WWJD? JWRTFM!

This message is a reply to:
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roxrkool
Member (Idle past 989 days)
Posts: 1497
From: Nevada
Joined: 03-23-2003


Message 25 of 28 (177688)
01-16-2005 10:04 PM
Reply to: Message 14 by RAZD
01-15-2005 10:47 AM


Re: Colour picture, composite
Oh wow! That shoreline composite is awesome! To have a rover on Titan would have been incredible. At least we get this, though.

This message is a reply to:
 Message 14 by RAZD, posted 01-15-2005 10:47 AM RAZD has replied

Replies to this message:
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RAZD
Member (Idle past 1405 days)
Posts: 20714
From: the other end of the sidewalk
Joined: 03-14-2004


Message 26 of 28 (177695)
01-16-2005 10:40 PM
Reply to: Message 25 by roxrkool
01-16-2005 10:04 PM


Re: Colour picture, composite
yes, I hope there are more pictures still to come even if the probe is now dead.

This message is a reply to:
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Neutralmind
Member (Idle past 6124 days)
Posts: 183
From: Finland
Joined: 06-08-2006


Message 27 of 28 (398018)
04-28-2007 9:19 PM


Anything new about Europa or Titan?
Sorry to bump a 2 year old topic, but well... I tried looking up the net for set dates for any probes to land on Europa or Titan but no luck.
Any projects going on about these two planets?

Replies to this message:
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Coragyps
Member (Idle past 735 days)
Posts: 5553
From: Snyder, Texas, USA
Joined: 11-12-2002


Message 28 of 28 (398021)
04-28-2007 9:28 PM
Reply to: Message 27 by Neutralmind
04-28-2007 9:19 PM


Re: Anything new about Europa or Titan?
They've found lakes of methane near one of the poles of Titan.
Nature 445, 61-64 (4 January 2007)
The surface of Saturn's haze-shrouded moon Titan has long been proposed to have oceans or lakes, on the basis of the stability of liquid methane at the surface1, 2. Initial visible3 and radar4, 5 imaging failed to find any evidence of an ocean, although abundant evidence was found that flowing liquids have existed on the surface5, 6. Here we provide definitive evidence for the presence of lakes on the surface of Titan, obtained during the Cassini Radar flyby of Titan on 22 July 2006 (T16). The radar imaging polewards of 70 north shows more than 75 circular to irregular radar-dark patches, in a region where liquid methane and ethane are expected to be abundant and stable on the surface2, 7. The radar-dark patches are interpreted as lakes on the basis of their very low radar reflectivity and morphological similarities to lakes, including associated channels and location in topographic depressions. Some of the lakes do not completely fill the depressions in which they lie, and apparently dry depressions are present. We interpret this to indicate that lakes are present in a number of states, including partly dry and liquid-filled. These northern-hemisphere lakes constitute the strongest evidence yet that a condensable-liquid hydrological cycle is active in Titan's surface and atmosphere, in which the lakes are filled through rainfall and/or intersection with the subsurface 'liquid methane' table.

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