Breaking News
Comments
Oldest First | Newest First | Threaded View
David Ashton
User Rank
Blogger
Great article
David Ashton   8/6/2014 8:04:03 PM
NO RATINGS
Nice article Jessica.   I always lament how little has happened on the moon since Apollo, but stories like this show how much is going on in space.

On projects that take this long I wonder if the designers wish thay had today's technology once the probe gets to its destination.  That said, the old technology does amazingly well - look at the Pioneers and Voyagers.

Susan Rambo
User Rank
Blogger
Water vapor
Susan Rambo   8/6/2014 11:20:09 PM
NO RATINGS
Wow. This is very exciting and will be an amazing feat. I wonder if the probe can stay latched on when the comet gets closer to the sun. I was wondering out loud to a space buff / amateur astronomer about how the electronics can withstand all the water vapor from the comet. He said "how does a submarine work....they have ways to protect the electronics." It would be interesting to know how they took the vapor into account during design and what will happen with this whole project. I can't wait. (Geez, it's our first comet cam?)

David Ashton
User Rank
Blogger
Re: Water vapor
David Ashton   8/7/2014 5:49:35 AM
NO RATINGS
@Susan...two cups a second on something 2 miles long is almost nothing.  They say it will get to a few thousand times that....still not a lot over that size, though I guess if you got condensation on the electronics it might cause problems.  I read somewhere that the tail of a comet is still better than most vacuums on earth...anyone with more knowledge care to comment?

Jessica Lipsky
User Rank
Author
Re: Water vapor
Jessica Lipsky   8/7/2014 11:57:24 AM
NO RATINGS
Two cups a second seems like a lot to me, even on a large surface! Apparently that amount could fill an olympic-sized swimming pool in short order.

 

You bring up an interesting point about condensation on electronics - I hadn't thought about that - but I imagine if they designed the lander for an icy surface with ash-like or snow-like particles, it could probably handle a bit of condensation. 

Jessica Lipsky
User Rank
Author
Re: Water vapor
Jessica Lipsky   8/7/2014 11:57:24 AM
NO RATINGS
Two cups a second seems like a lot to me, even on a large surface! Apparently that amount could fill an olympic-sized swimming pool in short order.

 

You bring up an interesting point about condensation on electronics - I hadn't thought about that - but I imagine if they designed the lander for an icy surface with ash-like or snow-like particles, it could probably handle a bit of condensation. 

Wnderer
User Rank
CEO
Giant Space Moonshiners
Wnderer   8/7/2014 5:09:47 PM
NO RATINGS
The comet looks like part of broken jug to me. The little part is the mouth and neck and the big part looks like it broke of the container.

MeasurementBlues
User Rank
Blogger
Re: Water vapor
MeasurementBlues   8/11/2014 11:47:14 PM
NO RATINGS
Jessica,

Electronics in space is completely different. Ten yeas ago, I visited General Dynamics in Scotsdale and wrote an article called "There's no place like space." One thing you wouldn't expect is that in space, electronics can get very hot.

Hot? But isn't space very cold?

Yes, but there's no air to carry away heat from electronics and thus you need large heat sinks. That's especially true when the electronics are facing the sun.

So what to I remember about that trip? I went to a Diamondbacks game where I thanked the person in the team store for sending Curt Schilling to Boston. Six months later, the Curse of the Bambino was broken.

MeasurementBlues
User Rank
Blogger
Re: Water vapor
MeasurementBlues   8/11/2014 11:48:32 PM
NO RATINGS
Susan,

See my reply to Jessica right below this comment.

Bill_Jaffa
User Rank
Blogger
Re: Water vapor
Bill_Jaffa   8/12/2014 8:47:25 AM
NO RATINGS
"In space, no one can hear you scream"--and there is no thermal conduction or convection, only radiation, to get rid of heat.

kfield
User Rank
Blogger
Shape of comet
kfield   9/15/2014 2:41:38 PM
NO RATINGS
The comet really does look like a rubber duck!



EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

Dr. Duino Diagnostic Shield Deduces Dilemmas in Arduino Shield Stacks
Max Maxfield
9 comments
As you are probably aware, I'm spending a lot of my free time creating Arduino-based projects, such as my Inamorata Prognostication Engine, my BADASS Display, and my Vetinari Clock.

EDN Staff

11 Summer Vacation Spots for Engineers
EDN Staff
20 comments
This collection of places from technology history, museums, and modern marvels is a roadmap for an engineering adventure that will take you around the world. Here are just a few spots ...

Glen Chenier

Engineers Solve Analog/Digital Problem, Invent Creative Expletives
Glen Chenier
15 comments
- An analog engineer and a digital engineer join forces, use their respective skills, and pull a few bunnies out of a hat to troubleshoot a system with which they are completely ...

Larry Desjardin

Engineers Should Study Finance: 5 Reasons Why
Larry Desjardin
46 comments
I'm a big proponent of engineers learning financial basics. Why? Because engineers are making decisions all the time, in multiple ways. Having a good financial understanding guides these ...

Flash Poll
Top Comments of the Week
Like Us on Facebook
EE Times on Twitter
EE Times Twitter Feed

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)