Featured Research

from universities, journals, and other organizations

First measurement of the age of cometary material

Date:
February 26, 2010
Source:
DOE/Lawrence Livermore National Laboratory
Summary:
Though comets are thought to be some of the oldest, most primitive bodies in the solar system, new research on comet Wild 2 indicates that inner solar system material was transported to the comet-forming region at least 1.7 million years after the formation of the oldest solar system solids.

Secondary electron image of the Coki section analyzed in this study showing mineral shards surrounded by compressed aerogel.
Credit: Image courtesy of DOE/Lawrence Livermore National Laboratory

Though comets are thought to be some of the oldest, most primitive bodies in the solar system, new research on comet Wild 2 indicates that inner solar system material was transported to the comet-forming region at least 1.7 million years after the formation of the oldest solar system solids.

The research by Lawrence Livermore National Laboratory scientists and colleagues provides the first constraint on the age of cometary material from a known comet.

The findings are published in the Feb. 25 edition of Science Express.

The NASA Stardust mission to comet Wild 2, which launched in 1999, was designed around the premise that comets preserve pristine remnants of materials that helped form the solar system. In 2006, Stardust returned with the first samples from a comet.

Though the mission was expected to provide a unique glimpse into the early solar system by returning a mix of solar system condensates, amorphous grains from the interstellar medium and true stardust (crystalline grains originating in distant stars), the initial results painted a different picture. Instead, the comet materials consisted of high-temperature materials including calcium-aluminum rich inclusions (CAIs), the oldest objects formed in the solar nebula. These objects form in the inner regions of the solar nebula and are common in meteorites.

The presence of CAIs in comet Wild 2 indicates that the formation of the solar system included mixing over radial distances much greater than has been recognized by scientists in the past.

"The inner solar system material in Wild 2 underscores the importance of radial transport of material over large distances in the early solar nebula," said lead author Jennifer Matzel of the Laboratory's Institute of Geophysics and Planetary Science and the Glenn T. Seaborg Institute. "These findings also raise key questions regarding the timescale of the formation of comets and the relationship between Wild 2 and other primitive solar nebula objects." Analysis showed that the inner solar system materials formed 1.7 million years after the onset of CAI formation.

Other LLNL team members include Hope Ishii, Ian Hutcheon, John Bradley, Peter Weber and Nick Teslich. Colleagues include scientists from the University of Washington, University of California, Los Angeles and the Smithsonian Institution.

Founded in 1952, Lawrence Livermore National Laboratory is a national security laboratory that develops science and engineering technology and provides innovative solutions to our nation's most important challenges. Lawrence Livermore National Laboratory is managed by Lawrence Livermore National Security, LLC for the U.S. Department of Energy's National Nuclear Security Administration.


Story Source:

The above story is based on materials provided by DOE/Lawrence Livermore National Laboratory. Note: Materials may be edited for content and length.


Journal Reference:

  1. J. E. P. Matzel, H. A. Ishii, D. Joswiak, I. D. Hutcheon, J. P. Bradley, D. Brownlee, P. K. Weber, N. Teslich, G. Matrajt, K. D. Mckeegan, G. J. Macpherson. Constraints on the Formation Age of Cometary Material from the NASA Stardust Mission. Science, Published Online February 25, 2010 DOI: 10.1126/science.1184741

Cite This Page:

DOE/Lawrence Livermore National Laboratory. "First measurement of the age of cometary material." ScienceDaily. ScienceDaily, 26 February 2010. <www.sciencedaily.com/releases/2010/02/100225164851.htm>.
DOE/Lawrence Livermore National Laboratory. (2010, February 26). First measurement of the age of cometary material. ScienceDaily. Retrieved September 2, 2014 from www.sciencedaily.com/releases/2010/02/100225164851.htm
DOE/Lawrence Livermore National Laboratory. "First measurement of the age of cometary material." ScienceDaily. www.sciencedaily.com/releases/2010/02/100225164851.htm (accessed September 2, 2014).

Share This




More Space & Time News

Tuesday, September 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: NASA Captures Solar Flare

Raw: NASA Captures Solar Flare

AP (Sep. 1, 2014) NASA reported the sun emitted a mid-level solar flare, on August 24th. NASA's Solar Dynamics Observatory captured the images of the flare, which erupted on the left side of the sun. (Sept. 1) Video provided by AP
Powered by NewsLook.com
Space Shuttle Discovery's Legacy, 30 Years Later

Space Shuttle Discovery's Legacy, 30 Years Later

Newsy (Aug. 30, 2014) The space shuttle Discovery launched for the very first time 30 years ago. Here's a look back at its legacy. Video provided by Newsy
Powered by NewsLook.com
Experiment Tests Whether Universe Is Actually A Hologram

Experiment Tests Whether Universe Is Actually A Hologram

Newsy (Aug. 27, 2014) Researchers at Fermilab are using a device called "The Holometer" to test whether our universe is actually a 2-D hologram that just seems 3-D. Video provided by Newsy
Powered by NewsLook.com
SpaceX’s Falcon 9 Rocket Explodes After Liftoff

SpaceX’s Falcon 9 Rocket Explodes After Liftoff

Newsy (Aug. 23, 2014) The private spaceflight company says it is preparing a thorough investigation into Friday's mishap. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins