Go Back   Freethought Forum > The Marketplace > The Sciences

Reply
 
Thread Tools Display Modes
  #1  
Old 09-14-2014, 10:22 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XVCCXXVI
Images: 28
Science Rosetta comet mission

Already interesting, but should get more so over the next few months as the comet nears the sun and the lander touches down. So here's a thread to discuss it.

Here's a size comparison of the comet with Los Angeles.

__________________

Reply With Quote
Thanks, from:
BrotherMan (09-15-2014), chunksmediocrites (09-14-2014), Crumb (09-15-2014), Dingfod (09-14-2014), Ensign Steve (09-14-2014), Janet (09-16-2014), JoeP (09-15-2014), Kael (09-15-2014), lisarea (09-15-2014), SR71 (09-14-2014), Stormlight (11-12-2014), Watser? (09-25-2014)
  #2  
Old 09-14-2014, 11:26 PM
SR71's Avatar
SR71 SR71 is offline
Stoic Derelict
 
Join Date: Sep 2011
Location: The Dustbin of History
Gender: Male
Posts: VCCCLIII
Images: 2
Default Re: Rosetta comet mission

Wrong thread!

__________________
Chained out, like a sitting duck just waiting for the fall _Cage the Elephant
Reply With Quote
Thanks, from:
ceptimus (09-14-2014), Stormlight (11-12-2014), Zehava (09-22-2014)
  #3  
Old 09-15-2014, 12:15 PM
JoeP's Avatar
JoeP JoeP is online now
[thanks] whisperer
 
Join Date: Jul 2004
Location: England/Miisaland
Gender: Male
Posts: XXMVCCXXVI
Images: 18
Default Re: Rosetta comet mission

Quote:
Originally Posted by ceptimus View Post
Here's a size comparison of the comet with Luxembourg.

:fixed:
__________________

:roadrun:
Free thought! Please take one!

:unitedkingdom:   :southafrica:   :unitedkingdom::finland:       :eur:       :m&ms::m&ms::twix::twix: (rotated 180°):m&ms::m&ms:
Reply With Quote
Thanks, from:
Janet (09-16-2014), livius drusus (11-13-2014), Miisa (09-15-2014), Pan Narrans (09-15-2014), SR71 (09-16-2014)
  #4  
Old 09-15-2014, 09:12 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XVCCXXVI
Images: 28
Default Re: Rosetta comet mission

The landing site for the lander, named Philae, has been chosen: it's on the 'head' part of the comet.



The lander will be 'dropped' from Rosetta from about 10km (6 miles) high - it will then free-fall to the comet's surface. The gravity of the comet is very weak, so even after the lander has fallen through that distance it will still only be going at about walking pace when it impacts. Philae is equipped with screws and harpoons in its landing feet, which will hopefully prevent it from bouncing back up or toppling over.

The landing is scheduled for November 11th. :eager:

In other news, Philae's camera was fired up recently for tests and used to take this 'selfie'. The camera has much lower resolution than the main cameras on Rosetta itself, but it's still an interesting shot showing parts of the Rosetta spacecraft with the comet in the background.

__________________

Reply With Quote
Thanks, from:
BrotherMan (09-15-2014), Crumb (09-15-2014), Dingfod (09-16-2014), Janet (09-16-2014), JoeP (09-15-2014), Kael (09-16-2014), livius drusus (11-13-2014), Miisa (09-16-2014), Pan Narrans (09-15-2014), SR71 (09-16-2014), The Lone Ranger (09-18-2014)
  #5  
Old 09-15-2014, 09:13 PM
BrotherMan's Avatar
BrotherMan BrotherMan is offline
A Very Gentle Bort
 
Join Date: Jan 2005
Location: Bortlandia
Gender: Male
Posts: XVDXXXI
Blog Entries: 5
Images: 63
Default Re: Rosetta comet mission

:1111:
__________________
\V/_
I COVLD TEACh YOV BVT I MVST LEVY A FEE
Reply With Quote
Thanks, from:
ceptimus (09-15-2014), Crumb (09-15-2014), Janet (09-16-2014), Miisa (09-16-2014), Pan Narrans (09-15-2014), SR71 (09-16-2014), ZEZOZE (11-23-2014)
  #6  
Old 09-15-2014, 10:54 PM
Crumb's Avatar
Crumb Crumb is offline
Cmurb!
 
Join Date: Jan 2005
Location: Cascadia
Gender: Male
Posts: LVMMMCCLXXXIV
Blog Entries: 22
Images: 355
Default Re: Rosetta comet mission

:coolness:
__________________
:joecool2: :cascadia: :ROR: :portland: :joecool2:
Reply With Quote
  #7  
Old 09-16-2014, 04:03 AM
Dingfod's Avatar
Dingfod Dingfod is offline
Gone Guy
 
Join Date: Jul 2004
Location: In a Hole
Gender: Male
Posts: XLMMDCLIII
Blog Entries: 21
Images: 92
Default Re: Rosetta comet mission

We're all going go die.
__________________
Sleep - the most beautiful experience in life - except drink.--W.C. Fields
Reply With Quote
  #8  
Old 09-16-2014, 05:37 AM
Angakuk's Avatar
Angakuk Angakuk is offline
NeoTillichian Hierophant & Partisan Hack
 
Join Date: Dec 2005
Location: Iowa
Gender: Male
Posts: MXCCCLXXXIII
Default Re: Rosetta comet mission

That is a given.
__________________
Old Pain In The Ass says: I am on a mission from God to comfort the afflicted and afflict the comfortable; to bring faith to the doubtful and doubt to the faithful. :shakebible:
Reply With Quote
  #9  
Old 09-18-2014, 09:09 AM
JoeP's Avatar
JoeP JoeP is online now
[thanks] whisperer
 
Join Date: Jul 2004
Location: England/Miisaland
Gender: Male
Posts: XXMVCCXXVI
Images: 18
Default Re: Rosetta comet mission

Rosetta's probe may land 500 metres from jets that produce comet's tail | Science | theguardian.com

THE JETS THAT PRODUCE THE COMET'S TAIL, PEOPLE!!!

Quote:
Intriguingly, site J has two “pits”, which look like the origin of jets of gas and dust ejected by the comet to form its tail. Holger Sierks of the Max Planck Institute for the Solar System, Göttingen, estimates that if all goes well, Philae could be just 500-600 metres away from these pits and so have a ringside seat as the jets get stronger the closer the comet gets to the sun in the coming months.
__________________

:roadrun:
Free thought! Please take one!

:unitedkingdom:   :southafrica:   :unitedkingdom::finland:       :eur:       :m&ms::m&ms::twix::twix: (rotated 180°):m&ms::m&ms:
Reply With Quote
Thanks, from:
Ari (09-18-2014), ceptimus (09-18-2014), Crumb (09-18-2014), Ensign Steve (09-18-2014), Janet (09-18-2014), lisarea (09-18-2014), livius drusus (11-13-2014), Pan Narrans (09-18-2014), The Lone Ranger (09-18-2014), Watser? (09-25-2014)
  #10  
Old 09-29-2014, 02:33 PM
JoeP's Avatar
JoeP JoeP is online now
[thanks] whisperer
 
Join Date: Jul 2004
Location: England/Miisaland
Gender: Male
Posts: XXMVCCXXVI
Images: 18
Default Re: Rosetta comet mission

BBC News - Rosetta: Date fixed for historic comet landing attempt

Wednesday 12 November
__________________

:roadrun:
Free thought! Please take one!

:unitedkingdom:   :southafrica:   :unitedkingdom::finland:       :eur:       :m&ms::m&ms::twix::twix: (rotated 180°):m&ms::m&ms:
Reply With Quote
Thanks, from:
ceptimus (09-29-2014), Crumb (09-29-2014)
  #11  
Old 09-29-2014, 06:18 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XVCCXXVI
Images: 28
Default Re: Rosetta comet mission

They changed it from the originally planned :1111: probably just to spite us.

Read the blog of the lead scientist of the Philae lander. The September 22nd entry about testing the harpoons was an interesting read, and today's entry gives loads of background information about the comet.
__________________

Reply With Quote
  #12  
Old 09-29-2014, 06:19 PM
BrotherMan's Avatar
BrotherMan BrotherMan is offline
A Very Gentle Bort
 
Join Date: Jan 2005
Location: Bortlandia
Gender: Male
Posts: XVDXXXI
Blog Entries: 5
Images: 63
Default Re: Rosetta comet mission

:sadcheer:
__________________
\V/_
I COVLD TEACh YOV BVT I MVST LEVY A FEE
Reply With Quote
  #13  
Old 10-10-2014, 07:28 PM
Corona688's Avatar
Corona688 Corona688 is offline
Forum Killer
 
Join Date: Aug 2004
Posts: MMMCMXIII
Default Re: Rosetta comet mission

Close-up of boulders stuck on the comet like crushed nuts on a dipped cone:




They call this one 'Cheops'.

https://www.mps.mpg.de/3812459/PM_20..._Cheops?c=2169
__________________
Reply With Quote
Thanks, from:
Ari (10-10-2014), ceptimus (10-10-2014), Dingfod (10-10-2014), Janet (10-10-2014), JoeP (10-10-2014), Kael (10-10-2014), livius drusus (11-13-2014), Stephen Maturin (10-10-2014), Stormlight (11-12-2014), Zehava (10-14-2014)
  #14  
Old 10-27-2014, 08:11 AM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XVCCXXVI
Images: 28
Default Re: Rosetta comet mission

__________________

Reply With Quote
Thanks, from:
Corona688 (10-27-2014), Crumb (10-27-2014), Janet (10-28-2014), JoeP (10-27-2014), Stormlight (11-12-2014)
  #15  
Old 11-11-2014, 03:52 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XVCCXXVI
Images: 28
Default Re: Rosetta comet mission

__________________

Reply With Quote
Thanks, from:
Ensign Steve (11-12-2014), JoeP (11-11-2014), Stormlight (11-12-2014)
  #16  
Old 11-11-2014, 05:28 PM
JoeP's Avatar
JoeP JoeP is online now
[thanks] whisperer
 
Join Date: Jul 2004
Location: England/Miisaland
Gender: Male
Posts: XXMVCCXXVI
Images: 18
Default Re: Rosetta comet mission

"while you just get set up there ..."
Too much like a work conference call. Makes you appreciate editors.
__________________

:roadrun:
Free thought! Please take one!

:unitedkingdom:   :southafrica:   :unitedkingdom::finland:       :eur:       :m&ms::m&ms::twix::twix: (rotated 180°):m&ms::m&ms:
Reply With Quote
  #17  
Old 11-11-2014, 06:51 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XVCCXXVI
Images: 28
Default Re: Rosetta comet mission

Yeah - they could have edited out a lot of dross before uploading to YouTube - they just copied the whole thing that was streamed live...

But there was some good information in there if you could put up with, or fast-forward, through the boring bits.

They mentioned that there is a live stream tomorrow covering the landing attempt. I may try to watch that...
__________________

Reply With Quote
Thanks, from:
Dingfod (11-12-2014)
  #18  
Old 11-11-2014, 07:28 PM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XVCCXXVI
Images: 28
Default Re: Rosetta comet mission

Nice animation showing what the lander is supposed to do if all goes well. :crossed:

__________________

Reply With Quote
Thanks, from:
Crumb (11-11-2014), Dingfod (11-12-2014), JoeP (11-12-2014), livius drusus (11-13-2014), Stormlight (11-12-2014)
  #19  
Old 11-12-2014, 07:37 AM
Ari's Avatar
Ari Ari is online now
I read some of your foolish scree, then just skimmed the rest.
 
Join Date: Jan 2005
Location: Bay Area
Gender: Male
Posts: MXCDLXXXIII
Blog Entries: 8
Default Re: Rosetta comet mission

1 hour till separation, 8 hours till touch down.
Philae is a go.
Hopefully it doesn't bounce.
ESADuring checks on the lander’s health, it was discovered that the active descent system, which provides a thrust to avoid rebound at the moment of touchdown, cannot be activated.

At touchdown, landing gear will absorb the forces of the landing while ice screws in each of the probe’s feet and a harpoon system will lock Philae to the surface. At the same time, a the thruster on top of the lander is supposed to push it down to counteract the impulse of the harpoon imparted in the opposite direction.

“The cold gas thruster on top of the lander does not appear to be working so we will have to rely fully on the harpoons at touchdown,”says Stephan Ulamec, Philae Lander Manager at the DLR German Aerospace Center.

“We’ll need some luck not to land on a boulder or a steep slope.”

Reply With Quote
Thanks, from:
ceptimus (11-12-2014), Dingfod (11-12-2014), Stormlight (11-12-2014)
  #20  
Old 11-12-2014, 10:39 AM
ceptimus's Avatar
ceptimus ceptimus is offline
puzzler
 
Join Date: Aug 2004
Location: UK
Posts: XVCCXXVI
Images: 28
Default Re: Rosetta comet mission

Live feed
__________________

Reply With Quote
Thanks, from:
Dingfod (11-12-2014), JoeP (11-12-2014), Stormlight (11-12-2014)
  #21  
Old 11-12-2014, 11:14 AM
JoeP's Avatar
JoeP JoeP is online now
[thanks] whisperer
 
Join Date: Jul 2004
Location: England/Miisaland
Gender: Male
Posts: XXMVCCXXVI
Images: 18
Default Re: Rosetta comet mission

People talking. And people not talking. Is there a graphic of where the Philae lander is at the moment? Or at least a km to go ticker. I can only find Where is Rosetta? which show Rosetta and 67P and the solar system, but no zoom in ...

Rosetta and Philae landing timeline | Rosetta - ESA's comet chaser says we should have Acquisition Of Signal at 10:53:20, 20 minutes ago.

ETA: https://twitter.com/philae2014 tweeted 4 minutes ago:
Quote:
Hello again! It’s nice to be back in contact, Earth! #CometLanding
__________________

:roadrun:
Free thought! Please take one!

:unitedkingdom:   :southafrica:   :unitedkingdom::finland:       :eur:       :m&ms::m&ms::twix::twix: (rotated 180°):m&ms::m&ms:
Reply With Quote
Thanks, from:
Dingfod (11-12-2014), livius drusus (11-13-2014), Stormlight (11-12-2014)
  #22  
Old 11-12-2014, 01:13 PM
JoeP's Avatar
JoeP JoeP is online now
[thanks] whisperer
 
Join Date: Jul 2004
Location: England/Miisaland
Gender: Male
Posts: XXMVCCXXVI
Images: 18
Default Re: Rosetta comet mission

If Rosetta mission succeeds, Finland will be first to land on comet | Yle Uutiset | yle.fi

A perfect Finnish headline. "If" it succeeds ...

Quote:
research professor Minna Palmroth from the Finnish Meteorological Institute (FMI) said that if the landing is successful, “the first contact will be with the FMI’s instruments and Finland will be first on the comet.”
Disappointingly, the Finnish Meteorological Institute does not yet have any weather forecasts for 67P.
__________________

:roadrun:
Free thought! Please take one!

:unitedkingdom:   :southafrica:   :unitedkingdom::finland:       :eur:       :m&ms::m&ms::twix::twix: (rotated 180°):m&ms::m&ms:
Reply With Quote
Thanks, from:
livius drusus (11-13-2014), Miisa (11-13-2014), Stormlight (11-12-2014)
  #23  
Old 11-12-2014, 04:03 PM
Dingfod's Avatar
Dingfod Dingfod is offline
Gone Guy
 
Join Date: Jul 2004
Location: In a Hole
Gender: Male
Posts: XLMMDCLIII
Blog Entries: 21
Images: 92
Default Re: Rosetta comet mission

If it finishes, that is.
__________________
Sleep - the most beautiful experience in life - except drink.--W.C. Fields
Reply With Quote
  #24  
Old 11-12-2014, 04:17 PM
JoeP's Avatar
JoeP JoeP is online now
[thanks] whisperer
 
Join Date: Jul 2004
Location: England/Miisaland
Gender: Male
Posts: XXMVCCXXVI
Images: 18
Default Re: Rosetta comet mission

Touchdown.

Quote:
Philae Lander @Philae2014 · 5m 5 minutes ago

Приземление! Мой новый адрес: 67P! #CometLanding
0 replies 259 retweets 119 favorites
Philae Lander @Philae2014 · 5m 5 minutes ago

Am aterizat! Noua mea adresă: 67P! #CometLanding
0 replies 68 retweets 77 favorites
Philae Lander @Philae2014 · 5m 5 minutes ago

Piezemēšanās! Mana jaunā adrese ir: 67P! #CometLanding
0 replies 1 retweet 0 favorites
Philae Lander @Philae2014 · 5m 5 minutes ago

Nusileidau! Mano naujas adresas: 67P! #CometLanding
0 replies 11 retweets 11 favorites
Philae Lander @Philae2014 · 6m 6 minutes ago

Touchdown! Min nya adress: 67P! #CometLanding
0 replies 133 retweets 88 favorites
Philae Lander @Philae2014 · 6m 6 minutes ago

Προσγείωση! Η νέα μου διεύθυνση: 67P! #CometLanding
0 replies 69 retweets 58 favorites
Philae Lander @Philae2014 · 6m 6 minutes ago

Přistání! Moje nová adresa: 67P! #CometLanding
0 replies 86 retweets 67 favorites
Philae Lander @Philae2014 · 7m 7 minutes ago

Touchdown! Min nye adresse: 67P! #CometLanding
0 replies 224 retweets 111 favorites
Philae Lander @Philae2014 · 7m 7 minutes ago

Lądowanie! Mój nowy adres: 67P! #CometLanding
0 replies 112 retweets 94 favorites
Philae Lander @Philae2014 · 7m 7 minutes ago

Landet! Min nye adresse: 67P! #CometLanding
0 replies 163 retweets 115 favorites
Philae Lander @Philae2014 · 8m 8 minutes ago

Ik ben geland! Mijn nieuwe adres is: 67P! #CometLanding
0 replies 311 retweets 157 favorites
Philae Lander @Philae2014 · 8m 8 minutes ago

ˇHe llegado! Mi nueva dirección: 67P! #CometLanding
0 replies 0 retweets 1 favorite
Philae Lander @Philae2014 · 8m 8 minutes ago

Perillä! Uusi osoitteeni on: 67P! #CometLanding
0 replies 34 retweets 17 favorites
Philae Lander @Philae2014 · 9m 9 minutes ago

Landoltam! Az új címem: 67P! #CometLanding
0 replies 49 retweets 35 favorites
Philae Lander @Philae2014 · 9m 9 minutes ago

Atterrato! Ecco il mio nuovo indirizzo: 67P! #CometLanding
0 replies 136 retweets 86 favorites
Philae Lander @Philae2014 · 10m 10 minutes ago

Atterrissage! Voici ma nouvelle adresse: 67P! #CometLanding
0 replies 337 retweets 165 favorites
Philae Lander @Philae2014 · 10m 10 minutes ago

Gelandet! Meine neue Adresse: 67P! #CometLanding
0 replies 324 retweets 246 favorites
Philae Lander @Philae2014 · 13m 13 minutes ago

Touchdown! My new address: 67P! #CometLanding
0 replies 7,782 retweets 2,924 favorites
__________________

:roadrun:
Free thought! Please take one!

:unitedkingdom:   :southafrica:   :unitedkingdom::finland:       :eur:       :m&ms::m&ms::twix::twix: (rotated 180°):m&ms::m&ms:
Reply With Quote
Thanks, from:
Crumb (11-12-2014), Dingfod (11-13-2014), livius drusus (11-13-2014), Stormlight (11-13-2014)
  #25  
Old 11-12-2014, 04:20 PM
JoeP's Avatar
JoeP JoeP is online now
[thanks] whisperer
 
Join Date: Jul 2004
Location: England/Miisaland
Gender: Male
Posts: XXMVCCXXVI
Images: 18
Default Re: Rosetta comet mission

And on the live stream ... lots more people talking ...
__________________

:roadrun:
Free thought! Please take one!

:unitedkingdom:   :southafrica:   :unitedkingdom::finland:       :eur:       :m&ms::m&ms::twix::twix: (rotated 180°):m&ms::m&ms:
Reply With Quote
Reply

  Freethought Forum > The Marketplace > The Sciences


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

 

All times are GMT +1. The time now is 08:30 AM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Page generated in 0.91619 seconds with 15 queries