NASA Developing Comet Harpoon For Sample Return 49
An anonymous reader writes "NASA appears to have decided that the best way to grab a sample of a rotating comet that is racing through the inner solar system at up to 150,000 miles per hour while spewing chunks of ice, rock and dust may be to avoid the risky business of landing on it. Instead, researchers want to send a spacecraft to rendezvous with a comet, then fire a harpoon to rapidly acquire samples from specific locations with surgical precision while hovering above the target."
Comet Harpoon? (Score:3)
This isn't as dangerous as Jax-Ur's Nova Javelin is it?
As much as I like this cool stuff (Score:1)
As much as I like all these cool endeavours that Nasa goes on, they really need to hurry up and invent a faster than light drive. April 4th, 2063 is fast approaching.
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I am not a trekkie, but you must be referring to this:
http://en.wikipedia.org/wiki/Star_Trek:_First_Contact [wikipedia.org]
The Enterprise arrives in the past, on April 4, 2063, the day before humanity's first encounter with alien life after Zefram Cochrane's historic warp drive flight.
So I assume that Zefram will invent it. I'll be sure to suggest that as a name candidate for my future grandchildren.
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Cromwell (actor who played Zefram) was 56 when the movie premiered, probably 55 when taped. Given that you'd expect the character's age to be within 5 years of that, a real Zefram would have\will be born between 2003 and 2013. You've got a chance to give birth to him yet yourself.
Re:As much as I like this cool stuff (Score:5, Funny)
You've got a chance to give birth to him yet yourself.
The chances of me giving birth to anyone are astronomical ;-)
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You can't go on the actor's age. Actors play characters of different ages than themselves all the time. Just look at the movie "Proof" that I saw recently, starring Gwenyth Paltrow; in it, she plays a girl in her mid/late 20s, but Gwenyth is almost 40. I guess they couldn't find any younger actresses with enough acting talent to play a math genius.... very sad.
Why stop there... (Score:3)
Re:Why stop there... (Score:4, Informative)
That would take a lot of reaction mass. More likely the comet takes the probe on a Nantucket sleighride.
What could possibly go wrong? (Score:3)
Drag a huge comet towards the earth... what could possibly go wrong?
So that's why they had harpoons (Score:4, Funny)
We're whalers on the moon we carry a harpoon but there ain't no whales so we tell tall tales and sing a whaling tune.
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Start Trek II seems more appropriate.
from hell's heart I stab at thee; for hate's sake I spit my last breath at thee. Sink all coffins and all hearses to one common pool! And since neither can be mine, let me then tow to pieces, while still chasing thee, though tied to thee, thou damned whale! Thus, I give up the spear! -- from Moby Dick
Get the Japanese to do it. (Score:5, Funny)
They're good at harpooning things for scientific research.
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The Great White Comet? (Score:3, Funny)
If they succeed (Score:3, Funny)
Greenpeace will foil this plan . . . (Score:5, Funny)
They will be out there in space in rubber boats, harassing NASA's comet hunting boat by throwing stinky paint at it, etc . . .
Although Bob Barker's last anti-whaling boat did look kinda sorta like a spacecraft already . . .
And NASA claims the comet hunting is for research purposes only. Ha! We all know better than that! The comet pieces will end up in the same place as all those "missing" moon rocks that Apollo brought back . . . in the free open rock market!
It's high time that the international community join together to ban this blood sport on endangered celestial bodies. Comets are scare and harpooning them will lead to their extinction.
When was the last time that you saw a comet in the wild?
I thought so . . .
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So, I'm not sure what ``a 2.5" hose lifting somebody out of the water'' is representative of.. Do
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Haha, are you the guy who was in the raft?
A naval ship of a sovereign nation has the right to defend itself from defacement. They weren't bullying anyone at all. Their method was harmless and happened to be hilarious. It illustrates the absurdity and stupidity of the protester: regardless of the validity of his protest, his methodology was silly, and he should have seen it coming. And he's lucky lethal force wasn't used, because after previous attacks on naval ships by small boats with bombs, it wouldn'
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Er, this is easier? (Score:3)
"...avoid the risky business of landing on it. Instead, researchers want to send a spacecraft to rendezvous with a comet, then fire a harpoon to rapidly acquire samples from specific locations with surgical precision while hovering above the target."
Aw, hell, is that all they want to do?!? Sheesh, for a minute there, I thought this was gonna be hard or something. You're right, shooting harpoons while locking in the cruise control around 150,000MPH sounds much easier, especially when you add the surgical precision accuracy requirement. (And as any man who has had a successful vasectomy can attest, there is a significant difference between surgical accuracy and "close enough".)
Aw, who am I kidding? This is NASA we're talking about. They've done amazing things, and will continue to do so. I just hope we can find a way to afford it.
ESA's Rosetta mission (Score:5, Informative)
While this is certainly interesting technology for future missions, it's worth remembering (as the original NASA article indeed does), that the European Space Agency's Rosetta mission was launched back in 2004 and is already en-route to its rendezvous with comet 67P/Churyumov-Gerasimenko in May 2014. It will "orbit" the comet and observe it as it returns to the inner solar system through 2014 and 2015.
But it will also deploy a small lander called Philae which will use two harpoons and then drills to "dock" with the comet (you don't really land on something with such low surface gravity) and sample the surface material in situ. As the NASA article points out, Philae's harpoon doesn't collect samples itself and, of course, Philae can only land at one location, carefully chosen to be safe through prior close-up observations by the main Rosetta spacecraft. But still, this is actually going to be done real soon now ...
Rosetta is currently in hibernation out several astronomical units from the Sun on a trajectory that'll have it meet up with the comet. There's insufficient sunlight out there to power the whole spacecraft, but enough for an alarm clock that should (!) go off in January 2014 when it's close enough to both Sun and comet to begin full operations.
So, looking forward to an exciting ride in 2014-2015, ringside seat right alongside a comet as it heats up and sheds material ...
I wonder... (Score:4, Informative)
I wonder if anyone at NASA has heard the term "Nantucket Sleigh Ride"?
Arms race (Score:2)
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Hayabusa had a pellet gun.
Make it a giant white one (Score:3)
... to the last I grapple with thee; from hell's heart I stab at thee; for hate's sake I spit my last breath at thee.
Touch and Go sampling (Score:5, Interesting)
The problem is not landing on the comet, the problem is that the comet's gravity is so weak that conventional sampling techniques will tend to push the spacecraft away, and it is not clear that you will be able to anchor the spacecraft firmly enough to avoid this. Similar problems exist with tether based sample return (where a long tether is used to match velocities with a target, and there are only a few seconds available to collect a sample).
There are various proposed solutions for this "touch and go" sampling problem. The recent Decadal Survey [usra.edu] provides an overview. Hayabusa tried to fire pellets [space.com] into Itokawa, to kick up some material for sampling. Other proposed solutions include cores and scoops [esa.int], "sticky pads [esa.int]," brush wheel samplers [nasa.gov]. A reasonable approach would probably be to try several attempts, if possible.
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Whichever one you want. Typically, it's chosen to be convenient (in this case, away from the comet).
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Nuke the baby comets for Jesus?
We'll call the spacecraft ... (Score:2)