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Cassini-Huygens Reaches Phoebe
Anonymous Explorer writes "The Cassini-Huygens
probe is set to fly by the largest outer Saturn moon of Phoebe today. Cassini will be roughly 2000 km from the surface of Phoebe at 1:56 Pacific time Friday, June 11. Thats
pretty darn close. The newest
images of Phoebe are already thousands of times better than the previous ones taken by the Voyager
2 mission in 1981. Phoebe is interesting in that it maintains a retrograde orbit around Saturn. This has lead to the hypothesis that it is an ancient asteroid that has been captured by the gravitational pull from Saturn. Phoebe may provide some important insights into the composition of early building blocks of our planets. Phoebe was discovered in 1898 by American astronomer William
Pickering. As always, discussion about this mission can be found at
#cassini on irc.freenode.net."
Google search, "define: retrograde"
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If Cassini confirms your theory that Phoebe is a probe, I think that will be a very valuable insight. It will mean there are aliens that were building probes long before us, and they could build probes that are hundreds of miles wide.
Hmmm, that deep crater looks like a good place to park the Millenium Falcon while we wait for that Star Destroyer to leave.
"No matter where you go, there you are." -- Buckaroo Banzai
Many people have that same idea about NASA and its exploration, that it will not give any valuable insight or information regarding the universe. I would like to think out of all of the mysteries of earth, space is the biggest one. Hopefully one day there will be valuable insight and information that will support a need for NASA besides pictures and samples of surfaces that wont even make it back to earth for a more indepth examination. These probes may gather the specific information the scientists are looking for but maybe something new can be found from looking and studying it in person, and perhaps some new tests could be created that could give us the valuable insight we seek.
This is just amazing. We're really reaching further and further out in the solar system. And not just by blindly sending probes out there, but by consciously seeking to get close to other bodies in the solar system, and really finding out. I really hope I get to see the Europa landings in my lifetime.
Quidquid latine dictum sit, altum sonatur.
How can you possibly determine what is or isn't valuable information before it's even discovered??
Granted there are never any guarantees, but the Cassini probe is going to be over 1000 times closer than previous probes. You never know what it might discover.
On the contrary, the phoebe probe will give us extremely valuable insight into the creation of our Solar System. In fact, it already has in that it is cratered (albeit, not seen as a major discovery to most people). Scientists have wondered for years how it managed to only reflect 6% of the light hitting it. In addition, since this may be a Kuiper object, it would be the only (relatively) stationary one within reasonable range from Earth to study.
Here are some links about phoebe and the Cassini-Huygens:
Phoebe
Cassini-Huygens
don't you humans get the message? what part of "ATTEMPT NO LANDINGS THERE" is hard to understand?
That is actually Phoebe on both sides. The right one is a picture of Phoebe 13 hours after the left one. it takes Phoebe only 9 and a half hours to make a full spin on it's axis (It has 9 and a half hour days). Those are two different hemispheres.
Having scoured the web sites --- it's actually quite hard to find the information --- the probe is doing the close flyby at 2056 UTC (i.e. about two and a half hours from now). Assuming I've got the daylight saving compensation right, of course...
you get to use local time! :P
I am very small, utmostly microscopic.
While I would have to agree that it seems as though if you've seen one moon, you've seen them all, it still adds value for the Cassini probe (not Phoebe, but I understand what you are hinting at) to explore Phoebe.
And yes, it is very possible that something unexpected will be seen. That would indeed give valuable insite. Even if it is just an ordinary hunk of rock, it will still give insight into the composition of other Saturnian moons and what to expect in that region of the solar system. Even as just a simple data point. It is expected that even more will be found, and frankly I look forward to visually exploring this world in a way that nobody until today has been able to see it like.
When the Voyager probes went by Io, there was no hint that it could possibly be showing active volcanoes, or be hinting at the distinct possibilities of seeing liquid oceans on Europa (admittedly buired under ice, but still there). I don't expect such a revelation with Phoebe, but you don't know. Perhaps a black monolith with proportions 1 x 4 x 9?
I'm really excited about the new photos... I hope they release full res mosaics and don't delay... pre-processed surface texture and heightmap data would be nice, too.
:)
If you want to get an idea of just how high res pictures they're going to get, do the following:
1) Download the program "Celestia". Build and run it.
2) While it is building, pull up the last picture that Cassini took of Phoebe.
3) When Celestia comes up, full screen it.
4) Go into the configuration and tell it to include full details. Exit the configuration menu.
5) Press enter, and type in "Phoebe". Press enter.
6) Press 'g' to go to Phoebe (note: Phoebe is currently false-texture in Celestia, since we don't know much about it)
7) Middle click and hold down, and drag the mouse until you're at a distance of 658,000 kilometers.
8) Press ctrl-'+' to zoom, until the resolution of Phoebe that you're seing on the screen is about the same as that in the NASA picture (note: resolution, not size. The nasa picture is enlarged).
9) Without changing the zoom, hold middle click againa nd drag the mouse until the distance is 2,000 kilometers.
10) Hold down shift, and use the arrow keys to look around. That's the sort of resolution images that they should be able to get.
Impressive, isn't it? I can't wait!
Carbon, made, only wants to be unmade.
The newest images of Phoebe are already thousands of times better than the previous ones taken by the Voyager 2 mission in 1981.
No, but it is hoped they will be. At best, the newest released images are 10x better than Voyager. Expect the high res images later today. You are getting ahead of yourself.
an ill wind that blows no good
It has a retrograde orbit
Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.
Phoebe is actually believed to be a captured Kuiper Belt object (KBO). This means its composition might be very icy/organic, making it more like a non-active comet than an asteroid.
"I'm so moist I'm sticking to the leather." -Kermit the Frog on The Late Late Show
Its lovely how there are cries of privatizing space and how we'd get to the stars faster if we only let regular joe mega corporations build spaceships. There plans go something like the familar pattern we've seen all over the place in /.
1. Privatize Space Exploration
2. ????
3. Profit!!
Right now there is little to no incentive for a company like Lockhead-Martin to build system to land people on the moon and build a moonbase. Science is a terrible profit motive unless you can find practicle applications. And since we know the moon isn't made of cheese (which you can sell) or littered with diamons the size of footballs no company has this burning desire to go into space. Its too costly to make money at it.
So we are stuck with government ventures. I'm glad the US, Russia, and China push these things but I have no illusions about how this works. They are doing it because their is a small bet of prestigue and a good way to spend military for R&D without making it so obvious.
So until you find out that Pheobe is made of 99% gold or Mars has rubies the size of boulders or something else interesting there is little point ot privatizing space over having world governments fund it. Simply put, governments don't care about profits.