60s Science---From everyday collection to environmental protection, think Green!

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阿泰UID：209473

January 5, 2009 Milky Way Now in Larger Size!
http://www.sciam.com/podcast/epi ... arger-size-09-01-05
We residents of the Milky Way should have a little extra skip in our step today. Turns out our home galaxy is much bigger and moving a lot faster than we previously thought. That’s what researchers from the Harvard–Smithsonian Center for Astrophysics reported January 5th at the meeting of the American Astronomical Society.

Older studies of our galaxy’s structure and motion used indirect measurements. But we can now use radio telescopes to directly observe certain features of the galaxy when we’re in very different places in our orbit around the sun. And using traditional surveying methods, such as triangulation, researchers came up with the new figures.

First, we’re moving about 600,000 miles per hour in our galactic orbit, a lot zippier than the old estimate of 500,000. And the Milky Way’s total mass is about half again as much as we used to think. Which means we’re about as massive as the nearby Andromeda Galaxy. The Milky Way’s bigger mass does mean a greater chance of a gravity-driven collision with Andromeda. But if that clash occurs, at least now we’re in the same weight-class.

—Steve Mirsky

一个词zippeier 更加敏捷的，迅速的

阿泰UID：209473

January 6, 2009 Dead Stars Tell of Rocky Planets
http://www.sciam.com/podcast/epi ... ky-planets-09-01-06

If we want to learn more about our planet and other planets in the universe, we can get some help from stars that are long dead and gone. That’s what U.C.L.A.’s Michael Jura said at the American Astronomical Society meeting January 5th. His team used observations from NASA’s Spitzer Space Telescope to investigate dead white dwarf stars.

Dust and debris swirl around young stars. The pieces clump together to form asteroids and bigger planets. When a star like our sun finally dies, it blows itself up, bright red. Then it shrinks down into a skeleton of its former self—a white dwarf. The gravitational pull of these white dwarfs can attract nearby asteroids that then get pulverized.

Eight different white dwarf systems were examined. In the surrounding asteroid dust, there was a mineral similar to olivine, which is common here on Earth. And there wasn’t much carbon, also similar to the make-up of asteroids and rocky planets in our own solar system. The results suggest that the same materials that make up Earth and our solar system's other rocky bodies could be common in the universe. As could be rocky planets themselves. An insight for which we can thank dead stars.

—Cynthia Graber

难词：Spitzer pulverized

chineseladyUID：2403976

We resident of the Milky Way should have a little extra   sip hour today turn out our home galaxy is much bigger and moving a lot faster than we previously thought.  That was the research from Harvard …..reported in January 5th at the meeting of America astronomic society. Older study of our galaxy structure motion/emotion use interact measurement but we can now use the radio telescope to rightly observe certain feature of galaxy when we were in every different places in our orbit around sun and using traditional serving measure such as triangulation research came up with new figures. First, we’re moving 6000 miles per hour in our orbit….than 600.5000 old and the Milky Way is total mess about half again as much as we used to think, which means…….. nearby   again. The Milky Way is mess doesn’t mean

每次听到最后2句都听的直恶心:vomit: :vomit:

[ 本帖最后由 hyacinth 于 2009-1-11 01:17 编辑 ]

chineseladyUID：2403976

We resident of the Milky Way should have a little extra   sip hour today turn out our home galaxy is much bigger and moving a lot faster than we previously thought.  That was the research from Harvard …..reported in January 5th at the meeting of America astronomic society. Older study of our galaxy structure motion/emotion use interact measurement but we can now use the radio telescope to rightly observe certain feature of galaxy when we were in every different places in our orbit around sun and using traditional serving measure such as triangulation research came up with new figures. First, we’re moving 6000 miles per hour in our orbit….than 600.5000 old and the Milky Way is total mess about half again as much as we used to think, which means…….. nearby   again. The Milky Way is mess doesn’t mean

[ 本帖最后由 hyacinth 于 2009-1-11 01:19 编辑 ]

chineseladyUID：2403976

老大！！！！！！！！

chineseladyUID：2403976

We resident of the Milky Way should have a little extra   sip hour today turn out our home galaxy is much bigger and moving a lot faster than we previously thought.  That was the research from Harvard …..reported in January 5th at the meeting of America astronomic society. Older study of our galaxy structure motion/emotion use interact measurement but we can now use the radio telescope to rightly observe certain feature of galaxy when we were in every different places in our orbit around sun and using traditional serving measure such as triangulation research came up with new figures. First, we’re moving 6000 miles per hour in our orbit….than 600.5000 old and the Milky Way is total mess about half again as much as we used to think, which means…….. nearby   again. The Milky Way is mess doesn’t mean

阿泰UID：209473

发了两遍

chineseladyUID：2403976

We resident of the Milky Way should have a little extra   sip hour today turn out our home galaxy is much bigger and moving a lot faster than we previously thought.  That was the research from Harvard …..reported in January 5th at the meeting of America astronomic society. Older study of our galaxy structure motion/emotion use interact measurement but we can now use the radio telescope to rightly observe certain feature of galaxy when we were in every different places in our orbit around sun and using traditional serving measure such as triangulation research came up with new figures. First, we’re moving 6000 miles per hour in our orbit….than 600.5000 old and the Milky Way is total mess about half again as much as we used to think, which means…….. nearby   again. The Milky Way is mess doesn’t mean......
每次听到最后2句都恶心的:vomit: :vomit:

chineseladyUID：2403976

字体不对:eek: :confused:

阿泰UID：209473

January 7, 2009 Reflected Light Disrupts Animal Behavior

Man-made light sources can really throw animals for a loop. Moths can't tear themselves away from lightbulbs, and newly hatched sea turtles often shun moonlit ocean waves for the bright lights of inland cities. But a study in January's issue of the journal Frontiers in Ecology and the Environment says direct light sources are only part of the problem.

Light that reflects off shiny urban surfaces, like roads, parking lots and buildings, has an equally devastating power to attract. That's because such polarized light means one thing to most animals—water. For example insects like dragonflies make nocturnal flights to lay their eggs using horizontally polarized light as a beacon. That light might bring them to a stream or pond, but a well-lit interstate is equally alluring. If enough insects lay eggs on the road instead of in the water, the entire food web can be disrupted.

But there are ways to dim our influential lights, the scientists say. Bugs are less attracted to roadways with white hatch marks on the pavement. And light-colored curtains can keep birds from slamming into dark buildings. Simple fixes, really, to keep basic instincts from turning into fatal attractions.

candyrealmeUID：2368154

在做听写啊？啊泰，你没考的吗？

阿泰UID：209473

是啊，在做听写

我考了啊

版主要参与版内活动的

我就做做这个吧，提高提高自己

梦想在望2008UID：2546295

请问 在那里可以获取最近文章的链接？

阿泰UID：209473

用itunes就可以了