Don Brownlee
Don Brownlee
boards columbia cultural genesis heavy level required review scrutiny shift undergone understand
We've undergone a very heavy level of scrutiny by review boards because of Genesis and because of the Columbia accident. . . . It was a cultural shift in NASA, that you're now required to understand all the risks.
almost billion grabbed incredible landed miles piece traveled visited
We traveled almost 3 billion miles in space. We visited a comet, grabbed a piece of it, and it landed here this morning. It's an incredible thrill.
materials study
But the study of these materials will go on for decades.
deliver earth form helped life material molecules organic whether
What we want to know is how organic molecules actually form in comets and whether they helped deliver organic material to the Earth before life began.
collected either form found high hottest normally red samples siberia solar white
We found the hottest samples in the coldest place. These are mineral grains that normally form under high temperature conditions. They were either red hot or white hot grains. Yet they were collected in the Siberia of the solar system.
collected grain
Every grain that we collected has a story to tell.
becomes crew far floating galaxy giant intrigued million names outlive people red silicon spacecraft sun
We have a crew onboard of over a million people -- their names are etched in a little silicon chip. As an astrobiology-type person, I'm intrigued by the thought that those names and that spacecraft will far outlive the Earth. When the Sun becomes a red giant and scorches the Earth, that spacecraft and those names will still be floating around the galaxy somewhere.
bright people quite sure
We weren't quite sure how bright it was going to be and some people didn't think we would see anything.
mission science
Much of the science of this mission hasn't been done yet.
formed hot major planets pluto regions solar sun system thrown
There are two major possibilities. One that they formed in the innermost, hotter-most regions of our solar system when the sun and planets were forming, and they were thrown out -- all the way out to the Pluto region of the solar system. The other possibility is they were formed around other stars, in hot regions around other stars.
earth easy fairly life planets
Life is fairly easy to create, but I think planets like Earth are going to be rare.
break concern major
One major concern was having it break open.
basic bring collect comet earth material mission primary purpose solar stardust
The primary purpose of the Stardust mission was to collect comet dust, the most basic material of the solar system, and bring it back to Earth for study.
backyard bringing collected comet course dust lands material particle per primitive square tons year
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.