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The Odds for Life on a Moonless Earth
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| Topic: Spaceship Earth |
08/04/11 |
| Summary: If a rocky planet has no moon, could complex life still arise? New research looks at the effects a large moon can have on a planet´s orbital stability over time. |
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Minor Planets Disrupt Earth's Orbit
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| Topic: Spaceship Earth |
07/19/11 |
| Summary: Long-term simulations show that close encounters between the minor planets Ceres and Vesta could affect the Earth's orbit. |
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Magnetic Reconnection
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| Topic: Spaceship Earth |
05/02/11 |
| Summary: A phenomenon known as 'magnetic reconnection' is responsible for much of the space weather that affects Earth. NASA is now preparing a new mission dedicated to studying this dynamic magnetic system and its influence on our planet. |
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The Importance of Being Magnetized
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| Topic: Spaceship Earth |
03/21/11 |
| Summary: Despite its magnetic field, Earth is losing its atmosphere to space at about the same rate as planets that lack this protective barrier against the solar wind. Scientists now are beginning to question whether magnetic fields really are vital to helping a planet hold on to its atmosphere. |
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Catching Space Weather in the Act
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| Topic: Spaceship Earth |
02/20/11 |
| Summary: Special cameras on the IBEX spacecraft have snapped their first pictures of the complex interactions between space weather and Earth's magnetic field. The new data could help astrobiologists understand the links between the space environment and Earth's habitability. |
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Earth's Dust Tail Could Help Find Alien Worlds
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| Topic: Spaceship Earth |
11/18/10 |
| Summary: Recent data from the Spitzer Space Telescope has helped scientist determine what the 'dust tail' of Earth looks like. The finding could help astrobiologists search for Earth-like planets because similar dust tails trailing behind extrasolar planets might actually be easier to spot than the planets themselves. |
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Carbon Dioxide is Key on Earth and Mars
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| Topic: Spaceship Earth |
10/17/10 |
| Summary: There are many factors influencing the Earth's greenhouse effect, but a new study indicates that global temperature ultimately depends on atmospheric level of carbon dioxide. Carbon dioxide may also hold secrets about the climate history of Mars. |
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A Strange Solar Flare Connection
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| Topic: Spaceship Earth |
08/28/10 |
| Summary: When researchers found an unusual linkage between solar flares and the inner life of radioactive elements on Earth, it touched off a scientific detective investigation that could end up protecting the lives of space-walking astronauts and maybe rewriting some of the assumptions of physics. |
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The Collapse of the Thermosphere
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| Topic: Spaceship Earth |
07/20/10 |
| Summary: "The thermosphere", the layer of Earth's atmosphere that meets space, recently collapsed and is now rebounding again...and we don't know why. The thermosphere is important because it shields us from the Sun's Extreme Ultraviolet Photons. |
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Water was Earth's Silver Lining from the Start
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| Topic: Spaceship Earth |
05/15/10 |
| Summary: Water is essential for life as we know it, and some scientists believe that the water on Earth was delivered by comets after the planet's formation. Now, a new study of silver in meteorites and Earth rocks tells a different story. |
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