Spitzer Searches for the Origins of Life

Jun 13, 2007
Spitzer Searches for the Origins of Life
This false-color composite from NASA's Spitzer Space Telescope and NASA's Chandra X-ray Observatory shows the remnant of one a supernova, or the explosive death of a star. Image credit: NASA/JPL- Caltech/Harvard-Smithsonian CfA

Astronomers suspect the early Earth was a very harsh place. Temperatures were extreme, and the planet was constantly bombarded by cosmic debris. Many scientists believe that life's starting materials, or building blocks, must have been very resilient to have survived this tumultuous environment.

Now, NASA's Spitzer Space Telescope has learned, for the first time, that organic molecules believed to be among life's building blocks, called polycyclic aromatic hydrocarbons, can survive another type of harsh setting, an explosion called a supernova. Supernovae are the violent deaths of the most massive stars. In death, these volatile objects blast tons of energetic waves into the cosmos, destroying much of the dust surrounding them.

The fact that polycyclic aromatic hydrocarbons can survive a supernova indicates that they are incredibly tough - like cosmic cockroaches enduring a nuclear blast. Such durability might be further proof that these molecules are indeed among life's building blocks.

Achim Tappe of the Harvard-Smithsonian Center for Astrophysics, Cambridge, Mass., used Spitzer's infrared spectrograph instrument to detect abundant amounts of polycyclic aromatic hydrocarbons along the ridge of supernova remnant N132D. The remnant is located 163,000 light-years away in a neighboring galaxy called, the Large Magellanic Cloud.

"The fact that we see polycyclic aromatic hydrocarbons surviving this explosion illustrates their resilience," says Tappe.

These intriguing molecules are comprised of carbon and hydrogen atoms, and have been spotted inside comets, around star-forming regions and planet-forming disks. Since all life on Earth is carbon based, astronomers suspect that some of Earth's original carbon might have come from these molecules - possibly from comets that smacked into the young planet.

Astronomers say there is some evidence that a massive star exploded near our solar system as it was just beginning to form almost 5 billion years ago. If so, the polycyclic aromatic hydrocarbons that survived that blast might have helped seed life on our planet.

Tappe's paper was published in the December 10, 2006, issue of Astrophysical Journal.

Source: by Whitney Clavin, JPL/NASA

Explore further: The riddle of galactic thin–thick disk solved

Related Stories

Molecular striptease explains Buckyballs in space

Dec 09, 2014

Scientists from Leiden University have shown in the laboratory how Buckyballs - molecular soccerballs - form in space. The experiments are special, as these are based on a new chemical concept - top-down, ...

Recommended for you

The riddle of galactic thin–thick disk solved

Apr 24, 2015

A long-standing puzzle regarding the nature of disk galaxies has finally been solved by a team of astronomers led by Ivan Minchev from the Leibniz Institute for Astrophysics Potsdam (AIP), using state-of-the-art ...

Giant cosmic tsunami wakes up comatose galaxies

Apr 24, 2015

Galaxies are often found in clusters, with many 'red and dead' neighbours that stopped forming stars in the distant past. Now an international team of astronomers, led by Andra Stroe of Leiden Observatory ...

Astronomers find runaway galaxies

Apr 23, 2015

We know of about two dozen runaway stars, and have even found one runaway star cluster escaping its galaxy forever. Now, astronomers have spotted 11 runaway galaxies that have been flung out of their homes ...

Celestial fireworks celebrate Hubble's 25th anniversary

Apr 23, 2015

The glittering tapestry of young stars flaring to life in this new NASA/ESA Hubble Space Telescope image aptly resembles an exploding shell in a fireworks display. This vibrant image of the star cluster Westerlund ...

User comments : 0

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.