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Judi Lynn

(160,545 posts)
Fri Nov 14, 2014, 08:31 PM Nov 2014

Philae probe drills into comet, turns toward light

Source: Associated Press

Philae probe drills into comet, turns toward light
By GEIR MOULSON, Associated Press | November 14, 2014 | Updated: November 14, 2014 6:24pm

BERLIN (AP) — The spacecraft that landed on a comet performed two tricky maneuvers Friday, by drilling into the rocky surface and rotating itself to catch more sunlight.

Both operations carried considerable risks, because they could have toppled the probe or push it out into the void. But without them the Philae lander that scored a historic first by touching down on a comet Wednesday risked skipping a key scientific experiment and running out of battery.

Scientists at the European Space Agency said the maneuvers appeared to have worked.

"My rotation was successful (35 degrees). Looks like a whole new comet from this angle," read a message posted on the lander's official Twitter account.

Earlier, the scientists tweeted: "First comet drilling is a fact!"

Since landing on comet 67P/Churyumov-Gerasimenko some 311 million miles (500 million kilometers) away, the lander has performed a series of tests and sent reams of data, including photos, back to Earth.

But with just two or three days of power in its primary battery, the lander has to rely on solar panels to generate electricity after that.


Read more: http://www.chron.com/news/science/article/European-probe-plants-thermometer-on-comet-5892326.php

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Philae probe drills into comet, turns toward light (Original Post) Judi Lynn Nov 2014 OP
This shit blows my mind...too bad teaparty said no more space program randys1 Nov 2014 #1
The Europeans did it, not the US starroute Nov 2014 #12
I believe that it what the poster meant... awoke_in_2003 Nov 2014 #16
is it on a collision course heaven05 Nov 2014 #2
I have wondered this actually....why spend so much money glinda Nov 2014 #4
If you like to know stuff, then you already know the answer The Traveler Nov 2014 #8
Space is super cheap when compaired to for example war Exultant Democracy Nov 2014 #25
No. But what they're learning can be used to attach a rocket to change the course of something else. Spitfire of ATJ Nov 2014 #11
The brains that work on something like sharp_stick Nov 2014 #3
Yeah they had to do some SERIOUS math to sync that landing... PatrickforO Nov 2014 #5
"...we're not going to be able to lead in stuff like this." Spitfire of ATJ Nov 2014 #13
Yes! Why, with the proper training, you and I could learn to... PatrickforO Nov 2014 #20
Big big kudos to the European Space Agency. oldandhappy Nov 2014 #6
HUGE K & R !!! - Thank You !!! WillyT Nov 2014 #7
Philae now in idle mode, possibly for a long time muriel_volestrangler Nov 2014 #9
So they built a machine that chases down an unsuspecting rock and sticks a probe in it. jtuck004 Nov 2014 #10
Well, Europe is more than one country, so "we" is appropriate. Thor_MN Nov 2014 #14
Junior partners who contributed to communication and navigation jakeXT Nov 2014 #22
Elevation of the actual contribution muddled in a headline. Should give credit where it is due. jtuck004 Nov 2014 #24
If there were no lander SCVDem Nov 2014 #15
K&R! Great news! Rhiannon12866 Nov 2014 #17
Rosetta comet mission: no communication from Philae lander muriel_volestrangler Nov 2014 #18
Thanks for the updates, hope something will work, somehow. n/t Judi Lynn Nov 2014 #19
yes, thanks. nt Duppers Nov 2014 #21
And this battery is 10 years old--not the latest technology. riversedge Nov 2014 #26
Philae spotted after first landing on 67P muriel_volestrangler Nov 2014 #23
Why is this a comet and not an asteroid? Bandit Nov 2014 #27
Scientists 'confident' comet lander will wake up Judi Lynn Nov 2014 #28

randys1

(16,286 posts)
1. This shit blows my mind...too bad teaparty said no more space program
Fri Nov 14, 2014, 08:36 PM
Nov 2014

stupid fucking assholes

But I love this stuff, landing on a comet?

How in the HELL did they do that


 

awoke_in_2003

(34,582 posts)
16. I believe that it what the poster meant...
Fri Nov 14, 2014, 11:20 PM
Nov 2014

The tea partiers here are against it, and they (Europe) went and did it.

 

The Traveler

(5,632 posts)
8. If you like to know stuff, then you already know the answer
Fri Nov 14, 2014, 09:38 PM
Nov 2014

And in terms of expenditures ... small potatoes compared to the costs of corruption and corporate welfare.

And what did we ourselves get out of our investment in space back in the 60s? Shall we begin with the technologies that allow us to communicate right now?

It's true for living things. It's true for cultures. Grow. Learn. Or go down.

Trav

 

Spitfire of ATJ

(32,723 posts)
11. No. But what they're learning can be used to attach a rocket to change the course of something else.
Fri Nov 14, 2014, 10:01 PM
Nov 2014

PatrickforO

(14,578 posts)
5. Yeah they had to do some SERIOUS math to sync that landing...
Fri Nov 14, 2014, 09:23 PM
Nov 2014

Of course, our education system is like 38th in the world behind Croatia, so unless we get our act together with STEM skills ASAP, we're not going to be able to lead in stuff like this.

 

Spitfire of ATJ

(32,723 posts)
13. "...we're not going to be able to lead in stuff like this."
Fri Nov 14, 2014, 10:03 PM
Nov 2014

True, but recently a billionaire said we little people could be plumbers.

PatrickforO

(14,578 posts)
20. Yes! Why, with the proper training, you and I could learn to...
Sat Nov 15, 2014, 12:37 PM
Nov 2014

take our place as wage slaves in the brave new Neoliberal economy.

oldandhappy

(6,719 posts)
6. Big big kudos to the European Space Agency.
Fri Nov 14, 2014, 09:33 PM
Nov 2014

ESA is a leader in great stuff. I am not sure why, but drilling into a comet made me smile. My idea of comets is ice and rocks. Sort of not substantial. I guess the lander will give us some real info on this. Exciting!!

muriel_volestrangler

(101,322 posts)
9. Philae now in idle mode, possibly for a long time
Fri Nov 14, 2014, 09:38 PM
Nov 2014
Our lander’s asleep

With its batteries depleted and not enough sunlight available to recharge, Philae has fallen into 'idle mode' -- a possibly long silence. In this mode, all instruments and most systems on board are shut down.

"Prior to falling silent, the lander was able to transmit all science data gathered during the First Science Sequence," says DLR's Stephan Ulamec, Lander manager, who was in the main control room at ESOC tonight.
...
Contact was lost at 00:36 UTC / 01:36 CET, not long before the scheduled communication loss that would have happened anyway as Rosetta orbited below the horizon.

From now on, no contact would be possible unless sufficient sunlight falls on the solar panels to generate enough power to wake it up. The possibility that this may happen was boosted this evening when mission controllers sent commands to rotate the lander's main body, to which the solar panels are fixed. This may have exposed more panel area to sunlight.

http://blogs.esa.int/rosetta/2014/11/15/our-landers-asleep/

Next possible contact is 8 hours from now. Before that post:

Lander battery voltage falling fast

On board Philae, system voltage has fallen very close to 21.5V; below that, the battery won't last much longer. At this time, there is insufficient sunlight to provide power.

http://blogs.esa.int/rosetta/2014/11/15/lander-battery-voltage-falling-fast/
 

jtuck004

(15,882 posts)
10. So they built a machine that chases down an unsuspecting rock and sticks a probe in it.
Fri Nov 14, 2014, 09:50 PM
Nov 2014

Who thought this up?

That's an amazing feat, has and will provide new knowledge. It makes me wonder if that was the only option, and why that project instead of others.

But I digress...

I am curious. > Is it just me, or has anyone else noticed the news coverage about how "WE" did this rosetta thing?

When the US shoots a spaceship off, they report the US shot a rocket.

But when the EU shoots one, it's WE, especially after it landed and is operating as it should.

Was it just the few headlines I saw, admittedly not a representative sample? Or perhaps like some of that new bipartisanship?

 

Thor_MN

(11,843 posts)
14. Well, Europe is more than one country, so "we" is appropriate.
Fri Nov 14, 2014, 10:19 PM
Nov 2014

That doesn't imply that the US is part of that "we".

What has surprised me is that the thruster didn't work, the harpoons didn't work, the thing bounced, landed sideways at the base of the cliff so the solar panels mostly don't work and it's being reported as a raging success. Practically the only thing that could have gone worse is if it missed or was totally dead when it detached. That's not to say it hasn't accomplished a lot already, but it has had some failure. If it had been a NASA probe, the teahadists and media would be screaming about wasted taxpayer money.

 

jtuck004

(15,882 posts)
24. Elevation of the actual contribution muddled in a headline. Should give credit where it is due.
Sun Nov 16, 2014, 03:56 PM
Nov 2014

More playing politics with science. That will get wider dissemination and do us less good than the data for a long while, maybe ...

I watched Japanese News during Fukushima - they taught people English in a second screen - words, pronunciations, etc.

We, on the other hand, demand Wolf Blitzer.

We is funny people.

 

SCVDem

(5,103 posts)
15. If there were no lander
Fri Nov 14, 2014, 10:55 PM
Nov 2014

just getting Rosetta in an orbit around a comet would be considered a success. Remember that this was not a flyby, but an ongoing orbit as the comet orbits the sun.

Why this comet and this mission? The scientists knew the cycle of 67P. They knew it would be getting closer than normal due to a brush with Jupiters gravity. Convenient information actually.

I love this sciencey stuff!!

We also get to see how close Hollywood got the terrain and gravity aspects of a comet.

What did you guys think a "dirty snowball" really looked like?

This is amazing! Great job ESA!

muriel_volestrangler

(101,322 posts)
18. Rosetta comet mission: no communication from Philae lander
Sat Nov 15, 2014, 08:46 AM
Nov 2014
The European Space Agency received no signals from the Philae lander Saturday morning during a scheduled effort to establish communication, the mission chief said.

Paolo Ferri, ESA's head of mission operations, told The Associated Press, that the Rosetta orbiter did not get any signals from the lander on comet 67P/Churyumov-Gerasimenko.
...
"We don't know if the charge will ever be high enough to operate the lander again," Ferri told The AP ahead of the 5 a.m. ET listening time.

"It is highly unlikely that we will establish any kind of communication any time soon, but nevertheless the orbiter will continue to listen for possible signals."

http://www.cbc.ca/news/technology/rosetta-comet-mission-no-communication-from-philae-lander-1.2836387

They need a minimum amount of sun to get anything going - they can't just gradually build up charge:

So that will be it, tonight: the last-ditch effort to cause Philae to move into a position in which its solar panels will be able to recharge the batteries. Mechanical movements will drain power quickly, so if they do manage to move things, it seems almost certain that that will be Philae's last act unless the unlikely happens and these last-ditch efforts really do effect a major change in the power situation.

A lot of people have been asking me whether the tiny amount of sunlight reaching the solar panels now would be enough to recharge the battery, given enough time. Lommatsch put that idea to rest.

It is very unlikely right now. We have 1.5 hours (of sunlight) at less than 1 watt, and 20 minutes of 3 or 4 watts. The lander needs 5 watts to boot....In order to charge the secondary battery, we have to heat it to 0 degrees Celsius. We need about 50-60 watt-hours a day in order to reach 0 degrees and still have daylight left to charge the battery. So it doesn't look that great. What we could hope for is if we are closer to perihelion, near 1 AU, maybe we could have enough energy on our one solar panel, maybe every once in a. Having (a communication) link requires additional power again.


http://www.planetary.org/blogs/emily-lakdawalla/2014/11141330-philae-update-my-last-day-in-darmstadt.html

muriel_volestrangler

(101,322 posts)
23. Philae spotted after first landing on 67P
Sun Nov 16, 2014, 03:46 PM
Nov 2014
The images were provided by ESA's Flight Dynamics team on Friday, who sent them to the web team to be published as soon as possible: we all wanted to make sure you saw them right away. Once we had convinced ourselves that the dark 'splotch' seen in the second of the images was almost certainly the tell-tale signature of Philae's precise first touch-down and bounce, we put them out.

However, some careful work by a number of people in ESA's Flight Dynamics team and by followers of our Rosetta blog has shown that these NAVCAM images show more, namely Philae itself, just after the bounce!

It appears as a couple of brighter pixels closely accompanied by its shadow in the form of a couple of darker ones just below, both to the right of the diffuse dust cloud shadow.

Credit for the first discovery goes to Gabriele Bellei, from the interplanetary division of Flight Dynamics, who spent hours searching the NAVCAM images for evidence of the landing.

http://blogs.esa.int/rosetta/2014/11/16/philae_spotted_after_first_landing/

Bandit

(21,475 posts)
27. Why is this a comet and not an asteroid?
Mon Nov 17, 2014, 06:06 PM
Nov 2014

I have yet to see the tail which I believe is the defining attribute of a comet.

Judi Lynn

(160,545 posts)
28. Scientists 'confident' comet lander will wake up
Mon Nov 17, 2014, 07:45 PM
Nov 2014

Scientists 'confident' comet lander will wake up
By FRANK JORDANS, Associated Press | November 17, 2014 | Updated: November 17, 2014 4:52pm

BERLIN (AP) — A burst of sunshine in the spring could be just the wakeup call for Europe's comet lander.

Scientists raised hopes Monday that as the Philae lander nears the sun its solar panel-powered battery will recharge, and the first spacecraft to touch down on a comet will send a second round of scientific data back to Earth.

Since landing with a bounce on the comet Wednesday, Philae has already sent back reams of data that scientists are eagerly examining. But there were fears its mission would be cut short because it came to rest in the shadow of a cliff. Its signal went silent Saturday after its primary battery ran out.

Shortly before that happened, the European Space Agency decided to attempt to tilt the lander's biggest solar panel toward the sun — a last-ditch maneuver that scientists believe may have paid off.

"We are very confident at some stage it will wake up again and we can achieve contact," Stephan Ulamec, the lander manager, told The Associated Press.

More:
http://www.chron.com/news/science/article/Results-from-comet-lander-s-experiments-expected-5897719.php

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