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Hot Topic
Deep Space
Cosmic Evolution
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The Faint and the Bright
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| Topic: Cosmic Evolution |
04/20/05 |
| Of the 500 scientifically interesting stars within 30 light-years, how many habitable zones will astronomers be able to image? If there's a planet in those habitable zones, how detectable will that planet be? |
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Re-igniting a Phoenix Star
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| Topic: Cosmic Evolution |
04/10/05 |
| Scientists have unveiled new research which shows how exploding stars may have helped to create the earth. The discovery was made during a unique research project examining how some dead stars re-ignite and come back to life. |
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Earths Galore
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| Topic: Cosmic Evolution |
04/05/05 |
| How many planets like the Earth are there among the 130 or so known planetary systems beyond our own? How many of these "Earths" could be habitable? Recent theoretical work indicates that as many as half of the known systems could be harbouring habitable "Earths" today. |
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April Solar Eclipse
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| Topic: Cosmic Evolution |
04/02/05 |
| Solar eclipses are grand cosmic events that no nature-watcher wants to miss -- and an opportunity to see one will occur for most of the southern United States on Friday afternoon, April 8th. |
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Bloated Star Births
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| Topic: Cosmic Evolution |
03/19/05 |
| Unlike humans, stars are born with all the weight they will ever have. A human's birth weight varies by just a few pounds, but a star's weight ranges from less than a tenth to more than 100 times the mass of our Sun. |
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Galactic Hide-and-Seek
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| Topic: Cosmic Evolution |
03/13/05 |
| How do you hide something as big and bright as a galaxy? You smother it in cosmic dust. NASA's Spitzer Space Telescope saw through such dust to uncover a hidden population of monstrously bright galaxies approximately 11 billion light-years away. |
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Whirlpool Haven for Planetary Birth
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| Topic: Cosmic Evolution |
03/01/05 |
| A new theory of how planets form finds havens of stability amid violent turbulence in the swirling gas that surrounds a young star. These protected areas are where planets can begin to form without being destroyed. The key to understanding how planets are made is a phenomenon called gravitational instabilities. |
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The Little Bang
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| Topic: Cosmic Evolution |
01/28/05 |
| Clear evidence in a Chinese meteorite for the past presence of chlorine-36, a short-lived radioactive isotope, lends further support to the controversial concept that a nearby supernova blast was involved in the formation of our solar system. |
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The Origins Umbrella
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| Topic: Cosmic Evolution |
01/26/05 |
| In Part One in the series on stellar and terrestrial evolution, Neil deGrasse Tyson, Director of the Hayden Planetarium and host of the PBS/NOVA Series "Origins", describes the origin and evolution of astrobiology and its public interpretations. |
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Floating Planets Put in their Place
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| Topic: Cosmic Evolution |
01/25/05 |
| According to new results from a powerful southern sky telescope, astronomers may have overestimated the number of young "brown dwarfs" and "free floating" extrasolar planets. Brown dwarfs are objects 75 times more massive than Jupiter but not massive enough to burn as stars. |
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