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Cluster Maps Convection
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| Topic: Spaceship Earth |
10/26/07 |
| Summary: By mapping convection cells in Earth's magnetic field for the first time, scientists have shown that the behavior of the cells is linked to solar activity. The activity of our Sun has profound implications for the habitability of Earth, and studying this connection can help us understand the conditions for habitability beyond our Solar System. |
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Argon Provides Atmospheric Clues
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| Topic: Spaceship Earth |
09/21/07 |
| Summary: New studies on how gases are expelled from the Earth may change the way scientists view atmospheric formation on the Earth, Mars and Venus. Studying the dynamics of Earth's atmosphere is essential in understanding what makes our planet habitable today. |
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Sunspots Bring Rain?
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| Topic: Spaceship Earth |
08/12/07 |
| Summary: Scientists have revealed a connection between solar activity and periods of heavy rain in East Africa. The findings show one way in which changes in the Solar System environment can directly affect life on Earth. |
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Can a Biosphere Be Selfish?
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| Topic: Spaceship Earth |
04/16/07 |
| Summary: In this book review of "Scientists Debate Gaia," Charley Lineweaver discusses what astrobiology and the Gaia hypothesis have in common. Both are trying to recognize new forms of life by seeking universal connections between different kinds of systems. |
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Earth's Magnetic Cocoon
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| Topic: Spaceship Earth |
04/08/07 |
| Summary: Researchers have found that the Earth's magnetic field was nearly as strong 3.2 billion years ago as it is today, which suggests that even in its earliest stages the Earth was protected from the solar wind. The findings of are immense interest to astrobiologists. |
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James Van Allen and Astrobiology
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| Topic: Spaceship Earth |
11/13/06 |
| Summary: In a lifetime devoted to instrumentation and rocket science, James Van Allen made immense contributions to the exploration of the space environment and its astrobiological potential. |
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Weather Wobbles
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| Topic: Spaceship Earth |
06/28/06 |
| Summary: New technologies are enabling scientists to determine precisely the extent and causes of Earth's short-term wobbling. Like a spinning top, Earth wobbles as it rotates on its axis. In fact, it displays many different wobbling motions, ranging in period from a few minutes to billions of years. |
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The Song of Killer Electrons
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| Topic: Spaceship Earth |
01/04/06 |
| Summary: ESA's Cluster mission has revealed a new creation mechanism of 'killer electrons' - highly energetic electrons that are responsible for damaging satellites and posing a serious hazard to astronauts. |
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Turning the Lights Off in Alaska
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| Topic: Spaceship Earth |
12/11/05 |
| Summary: After some 400 years of relative stability, Earth's North Magnetic Pole has moved nearly 1,100 kilometers out into the Arctic Ocean during the last century and at its present rate could move from northern Canada to Siberia within the next half-century. |
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Supernova Waves Rolled Over Mammoths
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| Topic: Spaceship Earth |
09/28/05 |
| Summary: A distant supernova that exploded 41,000 years ago may have led to the extinction of the mammoth, according to research that will be presented by nuclear scientist Richard Firestone of the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab). |
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