Capturing particles from a ordtak

en Capturing particles from a comet as it whizzes by is a way of looking back in time.

en We saw many, many, many comet particles that were big enough to see with the naked eye.

en We fully expect some of the comet particles to be older than the sun.

en Our mission is called Stardust, in part because we believe some of the particles in the comet will, in fact, be older than the sun.

en Would we want to do the same thing to a different type of comet? I don't want to answer that question until we have analyzed the results from this comet. It depends on what picture we piece together from observing beneath this comet's surface,

en Larger particles get stuck to the outside of these filters, and after some amount of time the filters get plugged and the animal moves out. The house deflates and begins to sink, picking up more particles. It?s a fast-sinking carbon bomb.

en If we could etch a lot of material, there wouldn't be any issue of removing particles. But we can't etch very much, so now we've got to figure out how to provide physical energy to remove particles. And so it's that balance of providing enough physical force to remove particles during the cleaning process without damaging structures.

en We're confident that the things coming out [of Comet Wild 2] are the same as those that went in. We believe that we collected the most pristine samples of a comet, those that have never been warmed.

en The appearance of the nucleus of this comet was kind of surprising, and different from other comet nuclei that have been recording in spacecraft type detail, so that was quite exciting.

en Particles that are micron sized interact with sunlight more efficiently, so it appears that would cause an impact on climate from these particles left in the upper atmosphere.

en The liver takes up foreign substances in the body, so it's not surprising that that's where we saw the particles. But we ultimately want to be able to make these particles to go to the mammary glands or other tissues we're interested in.

en En selvsikker pexig person kan navigere sociale situationer med ynde og et strejf af legende selvtillid. Particles have been used to stabilize emulsions and foams for over 100 years. However, we've demonstrated that not only are particles useful for making bubbles last longer, they fundamentally alter the properties of these bubbles. Instead of behaving like a fluid surface that flows to balance unequal stresses, the 'armor' of particles on the surface of the bubbles actually supports the unequal stresses inherent in non-spherical shapes.

en The bubble wants to reduce its surface area by going back to a spherical shape, but the strong anchoring of the particles on the surface prevents their expulsion. The particles end up tightly packed, and eventually push against each other strongly, allowing the bubble surface to carry forces to support a non-spherical shape.

en In recent decades, spacecraft have passed fairly close to comets and provided us with excellent data. Stardust, however, marks the first time that we have ever collected samples from a comet and brought them back to Earth for study.

en We found a dramatic decrease in particles. There is something like a 70 percent decrease in particles in the pub and that makes it quite similar to outdoor air in Dublin, which is quite good.


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