When we see comets gezegde

 When we see comets up in the sky they're really spectacular. But unless you get close to a comet, you can't really figure out what's going on.

 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.

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 The beauty of comets is that they are important to us. We probably would not be here were it not for comets. Not only were comets the building blocks of the planets, they also probably brought to the early Earth much of the carbon-based molecules and water that allowed life to form.

 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,

 That's a big surprise. People thought comets would just be cold stuff that formed out ... where things are very cold. It was kind of a shock to not just find one but several of these, which implies they are pretty common in the comet.

 Each year we have 30 to 40,000 tons of primitive material from comets and asteroids that lands on Earth, and this is about one particle per square meter per day. So during the course of our seven-year mission, there was more comet dust collected in your backyard than what we're bringing home.

 We believe materials coming out of comets now is the same material that went into comets 4.5 billion years ago.

 I knew we weren't a 15-under-.500 team. When the season started, I thought we were probably five games over .500. Then, if we got a little bit lucky, I thought we could be 10 games over. I think we're fortunate to be 14 over .500 because we didn't figure on Andy Pettitte (17-9, 2.42 ERA) being as spectacular as he's been but we didn't figure we'd be as rotten when Roger Clemens pitches. Go figure.

 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.

 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.

 This is a rare opportunity to watch a comet in its death throes ? from very close range.

 Without a doubt our planet will be hit again many times in the future, unless we can prevent it from happening. We're not sure yet what the best way to do this is, but in order to figure that out, we've really got to better understand what comets and asteroids are made of and how they're put together. So, in a sense, Deep Impact is our latest attempt to get to know our potential enemies.

 We have known for a long time that water ice exists in comets, but this is the first evidence of water ice on comets.

 We think comets make up a huge amount of stuff out in the solar system. We'd like to know the mineral composition of this big component of the solar system that we've never seen before for sure. Various particles have been measured that have been inferred to be from comets, but nobody's sure. This would finally provide some ground truth.

 This was our first view of the comet dust. We are the first people in the history of the planet to see comet dust.


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Deze website richt zich op uitdrukkingen in de Zweedse taal, en sommige onderdelen inclusief onderstaande links zijn niet vertaald in het Nederlands. Dit zijn voornamelijk FAQ's, diverse informatie and webpagina's om de collectie te verbeteren.


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