National Aeronautics and Space Administrion

Since its inception in 1958, NASA has accomplished many great scientific and technological feats in air and space. NASA technology also has been adapted for many nonaerospace uses by the private sector. NASA remains a leading force in scientific research and in stimulating public interest in aerospace exploration, as well as science and technology in general. Perhaps more importantly, our exploration of space has taught us to view Earth, ourselves, and the universe in a new way. While the tremendous technical and scientific accomplishments of NASA demonstrate vividly that humans can achieve previously inconceivable feats, we also are humbled by the realization that Earth is just a tiny "blue marble" in the cosmos. Check out our "Thinking About NASA History" folder online as an introduction to how history can help you.

Tuesday, February 21, 2012

Supernovas and Stardust

Supernovas and Stardust

A supernova is the biggest event in the universe. They take place vast distances from Earth. There a way we see our connection.

A supernova occurs when a star runs out of fuel and emploeds on itself or when it links inself with neighbouring stars and also causes a blackhole to occur. It is the grandest display of a lifecycle. The supernovas make the equivalent of energy, as the stars whole life. The good thing is understanding that these materials are a part of us.

There is a shockwave that shoots out of a star when it explodes. Compressed gas and space triggers this shockwave. We start seeing spiraling effects of materials being expelled from the dying star. This recycles the energy within the universe. These little bits of dust begin a process called ecreation.

The snowball effect takes off causing it to grow enormous eventually forming stars, planets or moons. It then collapses to the size of the Earth and smaller still within about a second.

Think about how many star elements have went nova to create your body. It is estimated that at least 93% of your body is stardust.

Mars and Earth have a ping-pong game going on with materials which is known as pan-spermia. We are a significant part of the cosmos. To end this I have a quote from Carl Sagan
"Matter is much older then life. Billions of years before the Sun and Earth even formed, atoms were being synthesized in the insides of hot stars and they returned to space when the stars blew themselves up. Newly formed planets were made out of the stellar debris, and Earth and every living thing, are made of star stuff."

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