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全部话题 - 话题: astronomic
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s******o
发帖数: 298
1
来自主题: Astronomy版 - U.K. Astronomers Join ESO Family[zz]
The United Kingdom becomes an official member of the European Southern
Observatory.
by Vanessa Thomas
More than 40 years ago, when European astronomers were dreaming big dreams
of building great telescopes at the world's best observing spots, U.K.
astronomers were part of the planning committee. But at the last moment, the
United Kingdom backed out of the future European Southern Observatory to
pursue other promising opportunities.
Later, with the ESO established as one of the astronomical power
s******o
发帖数: 298
2
来自主题: _Astronomy版 - U.K. Astronomers Join ESO Family[zz]
The United Kingdom becomes an official member of the European Southern
Observatory.
by Vanessa Thomas
More than 40 years ago, when European astronomers were dreaming big dreams
of building great telescopes at the world's best observing spots, U.K.
astronomers were part of the planning committee. But at the last moment, the
United Kingdom backed out of the future European Southern Observatory to
pursue other promising opportunities.
Later, with the ESO established as one of the astronomical power
s******o
发帖数: 298
3
来自主题: Astronomy版 - Astronomers Discover "Flying Saucer"[zz]
A chance discovery reveals a saucer-like dust disk around a young, sunlike
star.
by Vanessa Thomas
Some people claim to have seen flying saucers in the sky, but their
descriptions aren't like the one recently reported by an international team of
astronomers. While checking up on newly discovered x-ray sources, the group
happened across an edge-on protoplanetary disk with such an appearance that
the astronomers couldn't help but call it the "Flying Saucer."
In April 2001, Nicolas Grosso of the Ma
S***n
发帖数: 330
4
来自主题: Astronomy版 - Astronomers take first look inside quasars
http://www.earthsky.org/radioshows/astronomers-take-first-look-inside-quasars
JB: Astronomer Xinyu Dai at Ohio State University and his colleagues have
managed a first glimpse inside a quasar.
Xinyu Dai: Quasars are objects that are very far away. Because they are so
far away, when we look at them far away, directly, by imaging, they all look
like little dots.
DB: Quasars are distant, but we see them because they’re bright. The
brightest one shines some two trillion times more powerfully than ou
r*f
发帖数: 731
5
An astronomer, a physicist and a mathematician (it is said) were
holidaying in Scotland. Glancing from a train window, they
observed a black sheep in the middle of a field.
"How interesting," observed the astronomer, "all scottish sheep
are black!"
To which the physicist responded, "No, no! Some Scottish
sheep are black!"
The mathematician gazed heavenward in supplication, and then
intoned, "In Scotland there exists at least one field, containing at
least one sheep, at least one side of which is
s******o
发帖数: 298
6
来自主题: _Astronomy版 - Astronomers Discover "Flying Saucer"[zz]
A chance discovery reveals a saucer-like dust disk around a young, sunlike
star.
by Vanessa Thomas
Some people claim to have seen flying saucers in the sky, but their
descriptions aren't like the one recently reported by an international team of
astronomers. While checking up on newly discovered x-ray sources, the group
happened across an edge-on protoplanetary disk with such an appearance that
the astronomers couldn't help but call it the "Flying Saucer."
In April 2001, Nicolas Grosso of the Ma
S***n
发帖数: 330
7
来自主题: _Astronomy版 - Astronomers take first look inside quasars
http://www.earthsky.org/radioshows/astronomers-take-first-look-inside-quasars
JB: Astronomer Xinyu Dai at Ohio State University and his colleagues have
managed a first glimpse inside a quasar.
Xinyu Dai: Quasars are objects that are very far away. Because they are so
far away, when we look at them far away, directly, by imaging, they all look
like little dots.
DB: Quasars are distant, but we see them because they’re bright. The
brightest one shines some two trillion times more powerfully than ou
s******o
发帖数: 298
8
来自主题: Astronomy版 - An Astronomer Visits Iran(1)
Part I: Anticipating the Journey
Join contributing editor Mike Simmons on his journey through this ancient and
diverse land.
by Mike Simmons
The Sun sets over distant hills and the sky takes on sunset hues as telescopes
are brought out to meet the night. Talk of the observing to come breaks the
silence at this remote location in the desert, a refuge from city lights.
Amateur astronomers have had the same ritual for many years. But this place
is different. Desert caravans once passed this site on
s******o
发帖数: 298
9
Fast-rotating, cannibalistic stars help put Big Bang theory back on solid
ground
by William Schomaker
In a report in this week’s issue of the Astrophysical Journal, a team of UK
astronomers claims to have simultaneously solved longstanding problems with
the Big Bang, stellar evolution, and the abundance of lithium in the universe.
According to Sean Ryan, Ulrich Kolb, and Scott Gregory of the Open University
near London, England, the answer lies with three 14-billion-year-old stars
living at the
s******o
发帖数: 298
10
来自主题: Astronomy版 - An Astronomer Visits Iran(3)
Part III: Amateur Astronomy Conference
While in Tehran, Mike Simmons conducts a workshop at one of the largest
amateur astronomy conferences in the Middle East.
by Mike Simmons
The amateur astronomy workshop was far busier than I had anticipated. Roughly
150 amateur astronomers attended despite only six weeks notice. Most were
university and secondary students, many others were teachers, but almost all
were young compared with amateur workshops in the United States. The
workshop’s timing was dif
s*****t
发帖数: 1994
11
Nobel in Physics Is Awarded to 2 Americans
Two American astronomers who uncovered evidence about the origin of the
universe and how it grew into galaxies were awarded the Nobel Prize in
physics today.
The researchers, John Mather of NASA’s Goddard Space Flight Center in
Greenbelt, Md., and George Smoot of the Lawrence Berkeley National
Laboratory at the University of California, Berkeley, will split the prize
of 10 million Swedish kroners, about $1.37 million.
Dr. Mather and Dr. Smoot led a team
S***n
发帖数: 330
S***n
发帖数: 330
s******o
发帖数: 298
14
来自主题: _Astronomy版 - An Astronomer Visits Iran(1)
Part I: Anticipating the Journey
Join contributing editor Mike Simmons on his journey through this ancient and
diverse land.
by Mike Simmons
The Sun sets over distant hills and the sky takes on sunset hues as telescopes
are brought out to meet the night. Talk of the observing to come breaks the
silence at this remote location in the desert, a refuge from city lights.
Amateur astronomers have had the same ritual for many years. But this place
is different. Desert caravans once passed this site on
s******o
发帖数: 298
15
Fast-rotating, cannibalistic stars help put Big Bang theory back on solid
ground
by William Schomaker
In a report in this week’s issue of the Astrophysical Journal, a team of UK
astronomers claims to have simultaneously solved longstanding problems with
the Big Bang, stellar evolution, and the abundance of lithium in the universe.
According to Sean Ryan, Ulrich Kolb, and Scott Gregory of the Open University
near London, England, the answer lies with three 14-billion-year-old stars
living at the
s******o
发帖数: 298
16
来自主题: _Astronomy版 - An Astronomer Visits Iran(3)
Part III: Amateur Astronomy Conference
While in Tehran, Mike Simmons conducts a workshop at one of the largest
amateur astronomy conferences in the Middle East.
by Mike Simmons
The amateur astronomy workshop was far busier than I had anticipated. Roughly
150 amateur astronomers attended despite only six weeks notice. Most were
university and secondary students, many others were teachers, but almost all
were young compared with amateur workshops in the United States. The
workshop’s timing was dif
s*****t
发帖数: 1994
17
来自主题: _Astronomy版 - Nobel Physics Prize awarded to 2 astronomers
Nobel in Physics Is Awarded to 2 Americans
Two American astronomers who uncovered evidence about the origin of the
universe and how it grew into galaxies were awarded the Nobel Prize in
physics today.
The researchers, John Mather of NASA’s Goddard Space Flight Center in
Greenbelt, Md., and George Smoot of the Lawrence Berkeley National
Laboratory at the University of California, Berkeley, will split the prize
of 10 million Swedish kroners, about $1.37 million.
Dr. Mather and Dr. Smoot led a team
S***n
发帖数: 330
18
来自主题: Astronomy版 - Extreme Space Discoveries of 2012
http://news.yahoo.com/most-extreme-space-discoveries-2012-12084
Astronomical discoveries in 2012 have reshaped what we know about the
universe and pushed some instruments to the very limits of their observing
power.
Scientists discovered a galaxy that harbors an enormous central black hole
17 billion times more massive than the sun. Another research group spotted a
scorching-hot rocky planet in the closest star system to our own. Meanwhile
,the records for most massive galaxy cluster and most di... 阅读全帖
s***e
发帖数: 5242
19
by Freeman Dyson
12/2010
In 1946 Subrahmanyan Chandrasekhar gave a talk at the University of Chicago
entitled “The Scientist.” 1 He was then 35 years old, less than halfway
through his life and less than a third of the way through his career as a
scientist, but already he wa reflecting deeply on the meaning and purpose of
his work. His talk was one of a series of public lectures organized by
Robert Hutchins, then the chancellor of the university. The list of speakers
is impressive, and included ... 阅读全帖
M*****8
发帖数: 17722
20
http://www.sjsu.edu/faculty/watkins/medcartel.htm
The amount now spent on medical care by Americans is about twenty percent
more than they spend on food and about ten percent more than they spend on
housing. Some portion of the increased costs comes from the development of
new and expensive procedures, but that is only part of the story. The rise
in the cost of medical care is said to be out of control and somewhat of a
mystery. However there is really no mystery involved. It is due to the
subsi... 阅读全帖
d******a
发帖数: 32122
21
☆─────────────────────────────────────☆
grasswalker (饭后百步走) 于 (Sun Apr 1 00:29:47 2012, 美东) 提到:
这个很奇妙啊
一个月几千块钱的多了去了,别人都该抢银行去了?
别跟我说啥多少年教育,妈的街上要饭的还有发过science的呢
国内大学毕业,硕士毕业不如狗的多了去了,怎么医生们不拿高薪就可以昧着良心?
☆─────────────────────────────────────☆
ibmgoog (终极winner米帝万岁) 于 (Sun Apr 1 00:50:03 2012, 美东) 提到:
你也是民运老将了
你不明白么?
这个世界,各个行业都捏着把刀,每个行业的人都试图磨刀霍霍从别人那里砍下一块属
于自己的肉
医生,律师,法院,政府,都是要害
他们往这儿偏一偏,对过路人都是要命的事情
你想想,如果你要被开膛破肚了,你有胆对医生讨价还价么?你还想不想活了? 你是
想术后1年恢复呢?还是留个终身病根? 你跟医生打官司?你打得起么? 人体很复杂
的,有些人就可以1年恢复,有... 阅读全帖
j*******7
发帖数: 6300
22
来自主题: TrustInJesus版 - Why Our Universe Had A Beginning
Why We Know Our Universe, And Everything In It, Had A Beginning (Free Bible
Insert)
My career as a Cold Case Detective was built on being evidentially certain
about the suspects I brought to trial. There are times when my certainty was
established and confirmed by the cumulative and diverse nature of the
evidence. Let me give you an example. It’s great when a witness sees the
crime and identifies the suspect, but it’s even better if we have DNA
evidence placing the suspect at the scene. If the b... 阅读全帖
A***u
发帖数: 3714
23
来自主题: Parenting版 - 爱好天文的孩子们有福了,
有哪个父母能不能找到转播的电视台。
GENERAL
Get ready to witness meteor shower next week
Camelopardalids is never-before-seen event, astronomers say
By Aftab Kazmi, Bureau Chief
May 18, 2014
Al Ain: Stargazers in the UAE will get a nature’s treat next week by
witnessing a never-before-seen meteor shower called Camelopardalids.
The spectacular shower will be visible on the morning of May 24 when the
earth, for the first time, will pass through comet 209P/Linear’s leftovers.
Astronomers have been making arrangement... 阅读全帖
s*****r
发帖数: 11545
24
来自主题: Military版 - 那130亿光年远的东西呢?
虽然现在看见了,其实有可能在60亿年前就不存在了,这不是很可悲么?
http://news.yahoo.com/farthest-known-galaxy-universe-discovered
Farthest Known Galaxy in the Universe Discovered
A new celestial wonder has stolen the title of most distant object ever seen
in the universe, astronomers report.
The new record holder is the galaxy MACS0647-JD, which is about 13.3 billion
light-years away. The universe itself is only 13.7 billion years old, so
this galaxy's light has been traveling toward us for almost the whole
history of space an... 阅读全帖
l*****9
发帖数: 9501
25
来自主题: Military版 - 请教海水为啥会是咸的。
Where Did Earth's Water Come From?
Kristina Grifantini, Life's Little Mysteries Contributor | July 13, 2011
10:18am ET
Credit: Lars Jensen | umich.edu
The exact origin of our planet's water, which covers about 70 percent of
Earth's surface, is still a mystery to scientists. Many researchers think
that, instead of water forming at the same time as Earth, objects in the
outer solar system delivered water to Earth in violent collisions shortly
after its formation.
Researchers speculate that any... 阅读全帖
c****t
发帖数: 19049
26
来自主题: SciFiction版 - Black Hole Fires Gas 'Bullets' Into Space
Astronomers have captured the moment when a black hole launched super-fast "
bullets" of gas into space at one-quarter the speed of light, a new study
reports.
The black hole blasted out the gaseous bullets back in June 2009, and NASA's
Rossi X-ray Timing Explorer (RXTE) satellite and the ground-based Very Long
Baseline Array (VLBA) radio telescope were able to watch the drama unfold.
"Like a referee at a sports game, we essentially rewound the footage on the
bullets' progress, pinpointing when ... 阅读全帖
s******o
发帖数: 298
27
来自主题: Astronomy版 - 2002 Edgar Wilson Award(详细报道)
Seven amateur astronomers will split an annual award for their recent comet
discoveries.
by Vanessa Thomas
Many, if not all, astronomers have at one time dreamt of discovering a comet.
Few astronomical objects inspire the kind of awe and curiosity that comets
arouse.
In the past year, seven amateur astronomers around the world have fulfilled
this dream. They have already received one of the best rewards astronomy has
to offer: their names have been immortalized and linked with an object in
space
L*********y
发帖数: 322
28
Another recent female harassment case in UC-Berkeley.
http://www.nytimes.com/2015/10/15/science/geoffrey-marcy-to-res
Geoffrey Marcy to Resign From Berkeley Astronomy Department
Geoffrey Marcy, the renowned astronomer who was found guilty in a campus
investigation of sexually harassing students, is resigning from the faculty
of the University of California, Berkeley, where he has been a professor for
16 years.
In an email to members of the astronomy department on Wednesday, the interim
chairman ... 阅读全帖
s******o
发帖数: 298
29
来自主题: _Astronomy版 - 2002 Edgar Wilson Award(详细报道)
Seven amateur astronomers will split an annual award for their recent comet
discoveries.
by Vanessa Thomas
Many, if not all, astronomers have at one time dreamt of discovering a comet.
Few astronomical objects inspire the kind of awe and curiosity that comets
arouse.
In the past year, seven amateur astronomers around the world have fulfilled
this dream. They have already received one of the best rewards astronomy has
to offer: their names have been immortalized and linked with an object in
space
l**i
发帖数: 8144
30
来自主题: Military版 - Anthropic principle
简单地讲 就是谋事在人 成事在天
认为社会发展沿着某个预定方向发展的理论 都是傻逼理论
--------------------------------------
Anthropic principle
From Wikipedia, the free encyclopedia
In astrophysics and cosmology, the anthropic principle is the philosophical
argument that observations of the physical Universe must be compatible with
the conscious life that observes it. Some proponents of the argument reason
that it explains why the Universe has the age and the fundamental physical
constants necessary to accommodate conscious life. As a ... 阅读全帖
h*****9
发帖数: 6643
31
Is the Big-Bang a Religious Hoax?
Huascar Terra do Valle
Science is the opposite of religion. Right? No! Wrong! Religion is always
trying to infiltrate into religion. Sometimes it succeeds. For instance, in
the Big Bang theory.
Today it is almost unanimous among the orthodox astronomers and astrophysics
that the world was created some 12 billions ago from a magnificent
explosion of a primodial atom. In a few seconds, as the theory goes, all the
universe was created from this primordial explosion... 阅读全帖
z********n
发帖数: 1729
32
【 以下文字转载自 Headline 讨论区 】
发信人: zongheimun (feifei), 信区: Headline
标 题: Next Friday, a 130,000 ton asteroid is set to pass perilously close
to earth.
发信站: BBS 未名空间站 (Sat Feb 9 14:03:20 2013, 美东)
National Aeronautics and Space Administration experts who plotted its
trajectory are confident that the primordial rock, weighing an estimated 130
,000 metric tons, will pass within "a remarkably close distance" of Earth,
nearer than many orbiting communications satellites but far enough away to
safely sp... 阅读全帖
B*V
发帖数: 3365
33
【 以下文字转载自 Headline 讨论区 】
发信人: zongheimun (feifei), 信区: Headline
标 题: Next Friday, a 130,000 ton asteroid is set to pass perilously close
to earth.
发信站: BBS 未名空间站 (Sat Feb 9 14:03:20 2013, 美东)
National Aeronautics and Space Administration experts who plotted its
trajectory are confident that the primordial rock, weighing an estimated 130
,000 metric tons, will pass within "a remarkably close distance" of Earth,
nearer than many orbiting communications satellites but far enough away to
safely spee... 阅读全帖
l****z
发帖数: 29846
34
The odds of life existing on another planet grow ever longer. Intelligent
design, anyone?
By
Eric Metaxas
Dec. 25, 2014 4:56 p.m. ET
In 1966 Time magazine ran a cover story asking: Is God Dead? Many have
accepted the cultural narrative that he’s obsolete—that as science
progresses, there is less need for a “God” to explain the universe. Yet it
turns out that the rumors of God’s death were premature. More amazing is
that the relatively recent case for his existence comes from a surprising
place—s... 阅读全帖
g********2
发帖数: 6571
35
‘Winter Is Coming’ Warns The Solar Physicist The Alarmists Tried To
Silence
by James Delingpole12 Aug 2016
Make the most of this summer because it could be your last decent one:
winter is coming as the planet enters the most devastating cooling period
since the 65-year Maunder Minimum of the 17th and early 18th centuries.
This is the dire forecast of Professor Valentina Zharkova, a solar physicist
at Northumbria University, who has based her prediction on sun spot
activity – known to be a signif... 阅读全帖
G****r
发帖数: 3924
36
来自主题: NewYork版 - 今天,秋天来了
闷闷的雨,把阳光隔开
气温和树叶一样,一个劲儿得往下落
这样的天气,要更加努力些才能保持快乐
-------------------------------------------------------------------------
The official first day of the astronomical fall in 2011 as mandated by the
International Astronomical Union is September 23 for the northern hemisphere
and March 20/21 (depending on the time zone) for the southern hemisphere.
The official first day of the climatological fall as mandated by the World
Meteorological Organization is always September 1 local time for the
northern ... 阅读全帖
c****t
发帖数: 19049
37
Researchers have found the largest body of water anywhere in the universe,
to date, with mass that measures several trillion times the mass of water on
the entire planet Earth.
The reservoir is gigantic, holding 140 trillion times the mass of water in
the Earth's oceans, residing 10 billion light years away.
"Since astronomers expected water vapor to be present even in the early
universe, the discovery of water is not itself a surprise," the Carnegie
Institution, one of the groups behind the fin... 阅读全帖
W***q
发帖数: 152
38
来自主题: TrustInJesus版 - Commentary on Genesis Chapter 1 (6)
3. The Bible’s clear teaching of God’s creation and the uncertainty of
modern science.
a. Some scientists often act certain in their knowledge about the origin
of the universe, but their constant “revolutionary discoveries” prove
they are really just groping in the dark. Honest scientists, those not
puffed up with a proud arrogance, will admit this.
b. Some scientists may be arrogant when it comes to what can be known of
the universe, but we do not have to accept such arrogance. The cons... 阅读全帖
j*******7
发帖数: 6300
39
来自主题: TrustInJesus版 - Quotations from Scientists on Evolutionism
(The purpose of this page is to present quotations from scientists that
illustrate their recognition that the darwinian theory of evolution is bad
science.)
Interesting Quotations from Scientists on Evolutionism
Here are some of our favorite quotes by scientists speaking on the subject
of evolutionism. Note that many of these scientists are evolutionists
themselves, in spite of their comments. I suppose that they would maintain
that to admit that "God did it" would not be "intellectually satisfy... 阅读全帖
j*******7
发帖数: 6300
40
来自主题: TrustInJesus版 - Quotations from Scientists on Evolutionism
(The purpose of this page is to present quotations from scientists that
illustrate their recognition that the darwinian theory of evolution is bad
science.)
Interesting Quotations from Scientists on Evolutionism
Here are some of our favorite quotes by scientists speaking on the subject
of evolutionism. Note that many of these scientists are evolutionists
themselves, in spite of their comments. I suppose that they would maintain
that to admit that "God did it" would not be "intellectually satisfy... 阅读全帖
s******o
发帖数: 298
41
After a decade when other astronomical targets got more attention, the Milky
Way has come back into vogue as a hot research subject in the new millennium,
leading to a whole new picture of how the galaxy formed, how unimaginably
huge it is, and what it looks like from afar.
"There's been a renaissance in studying the Milky Way," says Steven Majewski,
an astronomer at the University of Virginia who specializes in the structure
of the galaxy.
As a result of the newfound interest, astronomers are r
s******o
发帖数: 298
42
来自主题: Astronomy版 - Young Stars Hiding in Old Galaxies[zz]
Astronomers find young stars where they thought only old stars existed.
by Vanessa Thomas
Though perhaps not as attractive as spiral galaxies, elliptical galaxies
appeal to astronomers who want to learn about the history of the universe from
the aged star clusters within their bounds. Elliptical galaxies are some of
the oldest members of the universe, and astronomers had never found signs of
youth within these galactic time capsules — until now.
With help from the some of the world's best telesc
S***n
发帖数: 330
43
来自主题: Astronomy版 - Dead Zones to the Rescue
Astronomers from McMaster University in Hamilton, Ontario find that "dead
zones"- which typically extend out to 13 astronomical units from the central
star of an extrasolar planetary system - can significantly slow planetary
migration so that planets are not lost to the systems. This release
summarizes work to be described in a press conference at the American
Astronomical Society meeting in Calgary, Alberta on June 5, 2006, and in an
invited talk at a scientific session during the meeting.
Surv
s*****t
发帖数: 1994
44
来自主题: Astronomy版 - China Joins Thirty Meter Telescope Project
China Joins Thirty Meter Telescope Project
November 17, 2009
PASADENA, Calif -- The National Astronomical Observatories of the Chinese
Academy of Sciences (NAOC) has joined the Thirty Meter Telescope Project (
TMT). As an Observer, China will participate in planning the development of
what will be the world's most advanced and capable astronomical observatory.
"The TMT is delighted to take this exciting new step forward in our
relationship with the National Astronomical Observatories of China,"
m*****e
发帖数: 129
45
来自主题: Biology版 - SCI - 2016
Rank Full Journal Title Total Cites Journal Impact Factor
1 CA-A CANCER JOURNAL FOR CLINICIANS 20,488 131.723
2 NEW ENGLAND JOURNAL OF MEDICINE 283,525 59.558
3 NATURE REVIEWS DRUG DISCOVERY 25,460 47.12
4 LANCET 195,553 44.002
5 NATURE BIOTECHNOLOGY 48,650 43.113
6 NATURE REVIEWS IMMUNOLOGY 31,545 39.416
7 NATURE MATERIALS 72,306 38.891
8 NATURE REVIEWS MOLECULAR CELL BIOLOGY 36,784 38.602
9 NATURE 627,846 ... 阅读全帖
s*****t
发帖数: 1994
46
来自主题: GeoSpace版 - New Mexico declares Pluto a planet
Do you know that in United Kingdom, there is a socity
Royal Astronomical Society, and it is the one which
includes all (quote its webpage) "astronomy & astrophysics,
geophysics, solar and solar-terrestrial physics, and
planetary sciences".
It is unlike in US, which has American Geophysical Union
and American Astronomical Society, two separate
organizations.
So, if following UK style, the new board should be named
"astronomical".
P*****s
发帖数: 375
47
来自主题: Science版 - Science Breakthrough '99 (5) Exoplanets
Plentiful planets.
Theorists think the universe is teeming with planets, but astronomers detected
the first extrasolar planet only 4 years ago. They spotted the wobbles induced
in its parent star, an indirect method that left room for skepticism. But in
1999 astronomers unequivocally confirmed the existence of exoplanets: They
caught one transiting the face of its star, significantly dimming that star's
brightness for a few hours every 3.5 days. Astronomers even sketched the
planet's characteris
s******o
发帖数: 298
48
After a decade when other astronomical targets got more attention, the Milky
Way has come back into vogue as a hot research subject in the new millennium,
leading to a whole new picture of how the galaxy formed, how unimaginably
huge it is, and what it looks like from afar.
"There's been a renaissance in studying the Milky Way," says Steven Majewski,
an astronomer at the University of Virginia who specializes in the structure
of the galaxy.
As a result of the newfound interest, astronomers are r
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发帖数: 298
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来自主题: _Astronomy版 - Young Stars Hiding in Old Galaxies[zz]
Astronomers find young stars where they thought only old stars existed.
by Vanessa Thomas
Though perhaps not as attractive as spiral galaxies, elliptical galaxies
appeal to astronomers who want to learn about the history of the universe from
the aged star clusters within their bounds. Elliptical galaxies are some of
the oldest members of the universe, and astronomers had never found signs of
youth within these galactic time capsules — until now.
With help from the some of the world's best telesc
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发帖数: 330
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来自主题: _Astronomy版 - Dead Zones to the Rescue
Astronomers from McMaster University in Hamilton, Ontario find that "dead
zones"- which typically extend out to 13 astronomical units from the central
star of an extrasolar planetary system - can significantly slow planetary
migration so that planets are not lost to the systems. This release
summarizes work to be described in a press conference at the American
Astronomical Society meeting in Calgary, Alberta on June 5, 2006, and in an
invited talk at a scientific session during the meeting.
Surv
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