UW astronomer hits cosmic paydirt with Stardust

January 18, 2006
UW astronomer hits cosmic paydirt with Stardust
In an experiment using a special air gun, particles were shot into aerogel at high velocities. This closeup shows particles captured in aerogel. The particles leave a carrot-shaped trail in the aerogel. NASA/Jet Propulsion Laboratory

Scientists at the Johnson Space Center in Houston were excited and awed Tuesday by what they saw when the sample-return canister from the Stardust spacecraft was opened.

"It exceeds all expectations," said Donald Brownlee, a University of Washington astronomy professor who is principal investigator, or lead scientist, for Stardust. "It's a huge success. We can see lots of impacts. There are big ones, there are small ones."

Stardust returned to Earth in a spectacular re-entry early Sunday after a 7-year mission to collect particles from comet Wild 2 and samples of interstellar dust streaming into our solar system from other parts of the galaxy. The comet dates from the formation of the solar system 4.6 billion years ago.

Brownlee calculated there might be more than a million microscopic specks of dust embedded in Stardust's aerogel collector. Aerogel, a remarkable material that is as much as 99.9 percent empty space, greatly reduced the stress of impact on the particles, he said. The carrot-shaped tracks of much larger particles are visible in the aerogel from several feet away, Brownlee said, and in some of the tracks the black comet dust is visible at the end of the track. One track, he said, "is almost large enough to put your little finger into it."

Scientists will search the aerogel grid for dust samples, and more than 65,000 people have signed up to help in a project called Stardust@home, in which their home computers will examine images of tiny sections of the aerogel grid looking for dust particles.

The Johnson Space Center will be the curator of the Stardust samples, and as many as 150 scientists worldwide are waiting to study them.

"Stardust is a phenomenal success," Brownlee said.

Stardust on the Web:
stardust.jpl.nasa.gov
www.nasa.gov/stardust

Source: University of Washington

Explore further: Using traces of ancient comet to explore the history of the Solar System

Related Stories

Mysteries of space dust revealed

August 29, 2014

The first analysis of space dust collected by a special collector onboard NASA's Stardust mission and sent back to Earth for study in 2006 suggests the tiny specks open a door to studying the origins of the solar system and ...

Seven samples from the solar system's birth

April 28, 2014

At this year's Lunar and Planetary Science Conference (LPSC), scientists reported that, after eight painstaking years of work, they have retrieved seven particles of interstellar dust from NASA's Stardust spacecraft.

Recommended for you

Ancient walnut forests linked to languages, trade routes

September 4, 2015

If Persian walnut trees could talk, they might tell of the numerous traders who moved along the Silk Roads' thousands of miles over thousands of years, carrying among their valuable merchandise the seeds that would turn into ...

Long-sought chiral anomaly detected in crystalline material

September 3, 2015

A study by Princeton researchers presents evidence for a long-sought phenomenon—first theorized in the 1960s and predicted to be found in crystals in 1983—called the "chiral anomaly" in a metallic compound of sodium and ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.