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Grand Admiral Special
Das ist schon heavy
Alien message 'may be in our DNA'
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The Reenchantment of the Solar System: Proposed Search for Local ET’st
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Sir Ulli
Alien message 'may be in our DNA'
und
The Reenchantment of the Solar System: Proposed Search for Local ET’st
mfg
Sir Ulli
Sir Ulli
Grand Admiral Special
BOULDER, Colorado – Consider it nothing short of the cosmic quest for all time: Understanding the origin, evolution, distribution, and fate of life on Earth and in the Universe.
That’s a tall order…but within the sights of experts gathering here this week to take part in the 2005 Biennial Meeting of the NASA Astrobiology Institute.
From the formation and evolution of habitable worlds to the origins of life, extra-solar planets, and future exploration technologies and strategies – dedicated scientists are tackling big questions in a big universe.
...
Unanswered questions
...
Scientists plugging away
...
Earth look-alikes?
The growing roster of planets found outside our solar system has shored up the prospect for “a whole lot of life” out there,” said Jill Tarter, Director of The Center for the Study of Life in the Universe at the SETI Institute in Mountain View, California.
“What a fabulous opportunity to think about the boundaries of what that life might be like,” Tarter said. “The planets are there. We can’t deny that anymore. It’s really setting the backdrop and driving forward everybody’s thinking. So it just gets more exciting to think about how nature might have generalized biology and geology,” she said.
Tarter also pointed to the Kepler mission and its future scouting for Earth-like planets. “This decade we’re going to be able to tell you something about the demographics of terrestrial planets. Either they are prevalent or they are very rare. But this is the decade to get those data,” she said.
full Story at Space.com
http://www.space.com/searchforlife/050411_astrobio_nasa.html
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The top three reasons for humans in space
It’s late at night, and you receive an urgent phone call from the White House. “The President wants to know why we should continue to put humans in space. He wants a one-page summary on his desk by tomorrow morning.” What do you write?
Lists of reasons for human spaceflight are readily available. The National Space Society has a detailed list, and SPACE.com has its Top 3 and Top 10. Nonetheless, there is a need for a concise list that can be easily recalled—perhaps something like this:
Humans are in space:
3. To work
2. To live
1. To survive
...
Many agree that it’s time for colonization. “The goal of the human spaceflight program should be to increase our survival prospects by colonizing space,” wrote Princeton astrophysicist J. Richard Gott in Time Travel in Einstein’s Universe. “If we were up there among the planets, if there were self-sufficient human communities on many worlds, our species would be insulated from catastrophe,” wrote Cornell space scientist Carl Sagan in Pale Blue Dot.
Colonization is not guaranteed. Human spaceflight is not guaranteed. They are the results of choices made by individuals in political offices, in government agencies, in boardrooms, in offices and in homes. These choices will influence this generation, but more crucially they will determine the lives of a great many generations to come:
“The theme of this book is that humanity is more at risk than at any earlier phase in its history. The wider cosmos has a potential future that could even be infinite. But will these vast expanses of time be filled with life, or as empty as the Earth’s first sterile seas? The choice may depend on us, this century.”
— Cambridge cosmologist Sir Martin Rees, Our Final Hour
http://www.thespacereview.com/article/352/1
und auch interessant
Surfing the Wavelengths
Maggie Turnbull, an astronomer with the Carnegie Institution, has spent many years thinking about what kind of stars could harbor Earth-like planets. Her database of potentially habitable star systems could be used as a target list for NASA's upcoming Terrestrial Planet Finder (TPF) mission.
Turnbull presented a talk, "Remote Sensing of Life and Habitable Worlds: Habstars, Earthshine and TPF," at a NASA Forum for Astrobiology Research on March 14, 2005.
This edited transcript of the lecture is part one of a four-part series.
...
http://www.astrobio.net/news/module...=article&sid=1519&mode=thread&order=0&thold=0
mfg
Sir Ulli
That’s a tall order…but within the sights of experts gathering here this week to take part in the 2005 Biennial Meeting of the NASA Astrobiology Institute.
From the formation and evolution of habitable worlds to the origins of life, extra-solar planets, and future exploration technologies and strategies – dedicated scientists are tackling big questions in a big universe.
...
Unanswered questions
...
Scientists plugging away
...
Earth look-alikes?
The growing roster of planets found outside our solar system has shored up the prospect for “a whole lot of life” out there,” said Jill Tarter, Director of The Center for the Study of Life in the Universe at the SETI Institute in Mountain View, California.
“What a fabulous opportunity to think about the boundaries of what that life might be like,” Tarter said. “The planets are there. We can’t deny that anymore. It’s really setting the backdrop and driving forward everybody’s thinking. So it just gets more exciting to think about how nature might have generalized biology and geology,” she said.
Tarter also pointed to the Kepler mission and its future scouting for Earth-like planets. “This decade we’re going to be able to tell you something about the demographics of terrestrial planets. Either they are prevalent or they are very rare. But this is the decade to get those data,” she said.
full Story at Space.com
http://www.space.com/searchforlife/050411_astrobio_nasa.html
und
The top three reasons for humans in space
It’s late at night, and you receive an urgent phone call from the White House. “The President wants to know why we should continue to put humans in space. He wants a one-page summary on his desk by tomorrow morning.” What do you write?
Lists of reasons for human spaceflight are readily available. The National Space Society has a detailed list, and SPACE.com has its Top 3 and Top 10. Nonetheless, there is a need for a concise list that can be easily recalled—perhaps something like this:
Humans are in space:
3. To work
2. To live
1. To survive
...
Many agree that it’s time for colonization. “The goal of the human spaceflight program should be to increase our survival prospects by colonizing space,” wrote Princeton astrophysicist J. Richard Gott in Time Travel in Einstein’s Universe. “If we were up there among the planets, if there were self-sufficient human communities on many worlds, our species would be insulated from catastrophe,” wrote Cornell space scientist Carl Sagan in Pale Blue Dot.
Colonization is not guaranteed. Human spaceflight is not guaranteed. They are the results of choices made by individuals in political offices, in government agencies, in boardrooms, in offices and in homes. These choices will influence this generation, but more crucially they will determine the lives of a great many generations to come:
“The theme of this book is that humanity is more at risk than at any earlier phase in its history. The wider cosmos has a potential future that could even be infinite. But will these vast expanses of time be filled with life, or as empty as the Earth’s first sterile seas? The choice may depend on us, this century.”
— Cambridge cosmologist Sir Martin Rees, Our Final Hour
http://www.thespacereview.com/article/352/1
und auch interessant
Surfing the Wavelengths
Maggie Turnbull, an astronomer with the Carnegie Institution, has spent many years thinking about what kind of stars could harbor Earth-like planets. Her database of potentially habitable star systems could be used as a target list for NASA's upcoming Terrestrial Planet Finder (TPF) mission.
Turnbull presented a talk, "Remote Sensing of Life and Habitable Worlds: Habstars, Earthshine and TPF," at a NASA Forum for Astrobiology Research on March 14, 2005.
This edited transcript of the lecture is part one of a four-part series.
...
http://www.astrobio.net/news/module...=article&sid=1519&mode=thread&order=0&thold=0
mfg
Sir Ulli
Sir Ulli
Grand Admiral Special
New Method Could Detect Alien Space Stations
Summary - (Apr 11, 2005) Since the beginning of astronomical observation, science has been viewing light on a curve. In a galaxy filled with thousands of eclipsing binary stars, we've refined our skills by measuring the brightness or intensity of so-called variable star as a function of time. The result is known as a "light curve". Through this type of study, we've discovered size, distance and orbital speed of stellar bodies and refined our ability to detect planetary bodies orbiting distant suns. Here on Earth, most of the time it's impossible for us to resolve such small objects even with the most powerful of telescopes, because their size is less than one pixel in the detector. But new research should let us determine the shape of an object... like a ringed planet, or an orbiting alien space station.
Full Story -
Illustration by: Jimmy Paillet
As of February 5, we know of 136 extrasolar planets. These have been discovered in four ways: The first - called pulsar timing - allowed us to detect Earth-sized and smaller planets by studying the variations in arrival time of radiation generated by a pulsar. The next - Doppler spectroscopy - allows ground-based telescopes to measure the "shift" in a star's spectrum caused by the gravity of an orbiting planet. The third - astrometry - is used in much the same way - looking for the periodic "wobble" in position that a possible planet could cause on its parent star. And the last? Transit photometry allows for the study of the periodic dimming of a star as a body passes in front of it from a particular viewpoint - producing
...
http://www.universetoday.com/am/publish/alien_space_stations.html?1142005
mfg
Sir Ulli
Summary - (Apr 11, 2005) Since the beginning of astronomical observation, science has been viewing light on a curve. In a galaxy filled with thousands of eclipsing binary stars, we've refined our skills by measuring the brightness or intensity of so-called variable star as a function of time. The result is known as a "light curve". Through this type of study, we've discovered size, distance and orbital speed of stellar bodies and refined our ability to detect planetary bodies orbiting distant suns. Here on Earth, most of the time it's impossible for us to resolve such small objects even with the most powerful of telescopes, because their size is less than one pixel in the detector. But new research should let us determine the shape of an object... like a ringed planet, or an orbiting alien space station.
Full Story -
Illustration by: Jimmy Paillet
As of February 5, we know of 136 extrasolar planets. These have been discovered in four ways: The first - called pulsar timing - allowed us to detect Earth-sized and smaller planets by studying the variations in arrival time of radiation generated by a pulsar. The next - Doppler spectroscopy - allows ground-based telescopes to measure the "shift" in a star's spectrum caused by the gravity of an orbiting planet. The third - astrometry - is used in much the same way - looking for the periodic "wobble" in position that a possible planet could cause on its parent star. And the last? Transit photometry allows for the study of the periodic dimming of a star as a body passes in front of it from a particular viewpoint - producing
...
http://www.universetoday.com/am/publish/alien_space_stations.html?1142005
mfg
Sir Ulli
Sir Ulli
Grand Admiral Special
by Christopher Chyba, SETI Institute
Carl Sagan Chair for the Study of Life in the Universe
Principal Investigator, NASA Astrobiology Institute team
For the past year, the SETI Institute has been one of the lead teams in NASA’s Astrobiology Institute (NAI), and this week many members of the SETI Institute have been in Boulder, CO for the biennial meeting of the NAI. The SETI Institute’s team pulls together a dozen of our scientists and educators in Life in the Universe research, SETI research, and Education and Public Outreach to address some of the most important questions in astrobiology. Chief among these is to understand how the origin and evolution of life depends upon particular planetary environments, and how, in turn, planetary environments may themselves be shaped by biology. We are pursuing these questions by investigating a number of worlds in our own solar system, and by asking similar questions about worlds orbiting other stars.
Within our solar system, our work starts with the early Earth. As long as Earth remains the only world on which life is known to exist, astrobiology has little choice but to build on our knowledge of terrestrial biology. We must always be aware that life in other places may have found other ways to make its biology work, but exploring terrestrial life nevertheless gives us the starting point for many of the questions we ask.
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http://www.seti.org/site/apps/nl/content2.asp?c=ktJ2J9MMIsE&b=194993&ct=642353
mfg
Sir Ulli
Sir Ulli
Grand Admiral Special
Look out for giant triangles in space
THE search for extraterrestrial intelligence (SETI) could be taking the wrong approach. Instead of listening for alien radio broadcasts, a better strategy may be to look for giant structures placed in orbit around nearby stars by alien civilisations.
"Artificial structures may be the best way for an advanced extraterrestrial civilisation to signal its presence to an emerging technology like ours," says Luc Arnold of the Observatory of Haute-Provence in France. And he believes that the generation of space-based telescopes now being designed will be able to spot them.
Arnold has studied the capabilities of space-based telescopes such as the European Space Agency's forthcoming Corot telescope and NASA's Kepler. These instruments will look for the telltale dimming of a star's light when a planet passes in front of it. They could also identify an artificial object the size of a planet, such as a lightweight solar sail, says Arnold. His work will be published in The Astrophysical Journal
...
http://www.newscientist.com/article.ns?id=mg18624944.800
mfg
Sir Ulli
THE search for extraterrestrial intelligence (SETI) could be taking the wrong approach. Instead of listening for alien radio broadcasts, a better strategy may be to look for giant structures placed in orbit around nearby stars by alien civilisations.
"Artificial structures may be the best way for an advanced extraterrestrial civilisation to signal its presence to an emerging technology like ours," says Luc Arnold of the Observatory of Haute-Provence in France. And he believes that the generation of space-based telescopes now being designed will be able to spot them.
Arnold has studied the capabilities of space-based telescopes such as the European Space Agency's forthcoming Corot telescope and NASA's Kepler. These instruments will look for the telltale dimming of a star's light when a planet passes in front of it. They could also identify an artificial object the size of a planet, such as a lightweight solar sail, says Arnold. His work will be published in The Astrophysical Journal
...
http://www.newscientist.com/article.ns?id=mg18624944.800
mfg
Sir Ulli
Sir Ulli
Grand Admiral Special
Summary - (Apr 26, 2005) An international team of astronomers have performed a robust survey of quasars to confirm a prediction from Albert Einstein about how gravity should magnify the light traveling from distant objects. The study showed how the light from 200,000 quasars is being tugged by the gravity of 13 million galaxies as it travels from the quasars to the Earth. The researchers used the Sloan Digital Sky Survey to uncover thousands of new quasars which could then fine-tune their observations.
Full Story - Applying cutting edge computer science to a wealth of new astronomical data, researchers from the Sloan Digital Sky Survey (SDSS) reported today the first robust detection of cosmic magnification on large scales, a prediction of Einstein's General Theory of Relativity applied to the distribution of galaxies, dark matter, and distant quasars.
These findings, accepted for publication in The Astrophysical Journal, detail the subtle distortions that light undergoes as it travels from distant quasars through the web of dark matter and galaxies before reaching observers here on Earth.
...
200,000 Quasars Confirm Einstein's Prediction
für die Einstein@home Users...
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Sir Ulli
Full Story - Applying cutting edge computer science to a wealth of new astronomical data, researchers from the Sloan Digital Sky Survey (SDSS) reported today the first robust detection of cosmic magnification on large scales, a prediction of Einstein's General Theory of Relativity applied to the distribution of galaxies, dark matter, and distant quasars.
These findings, accepted for publication in The Astrophysical Journal, detail the subtle distortions that light undergoes as it travels from distant quasars through the web of dark matter and galaxies before reaching observers here on Earth.
...
200,000 Quasars Confirm Einstein's Prediction
für die Einstein@home Users...
mfg
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