博客
Portrait of a youthful planet 1
2010-10-04 08:56
“People have been predicting the existence of this massive planet for many years, and these images are finally what we have been waiting for,” says Christian Marois of the Herzberg Institute of Astrophysics in Victoria, Canada, who is not part of the team.
Additional observations will provide new information on the composition of the atmosphere of this Jupiter-like planet, which lies about 65 light-years from Earth, notes Lagrange. Observations of the planet, dubbed Beta Pictoris b, will also reveal new details about its interaction with a disk of gas and dust known to encircle the star and extend beyond the planet. This debris disk is believed to have arisen from the dust generated by collisions within a reservoir of comets or asteroids.
“This discovery will be a gold mine for scientists who study how planets form and
evolve in the presence of a disk of comets and asteroids,” comments astronomer Paul Kalas of the University of California, Berkeley, who was not involved in the new study.
Given the youth of Beta Pictoris, which is only about 12 million years old, the massive planet orbiting the star “in some ways is a snapshot of what our sun-Jupiter system looked like just after our own solar system was born,“ Kalas adds. “We have several competing theories of how the planets form, so a picture of a young planet is going to tell us which theoretical principles we should be adopting.”
The youngest confirmed planets previously photographed around stars were a trio of 60-million-year-old planets circling the star HR 8799.
Marois says the amount of dust and gas that endures in the disk beyond the planet suggests that “Beta Pictoris is in the process of forming a multiplanet system.”
The disk, studied by countless telescopes for nearly three decades, first clued researchers that the star might harbor the raw materials for making planets. In 2003, Lagrange and her collaborators at the time, using a special camera on the European Southern Observatory’s Very Large Telescope atop Cerro Paranal in Chile, spotted a faint point of light within the disk, but they could not tell whether the object was a planet or a spurious signal from a background star.
In images taken in the fall of 2009 with the instrument, the researchers discerned that the object moved in sync with the star, confirming the body was an orbiting planet. The orb has the right location and mass to account for a known warp in the disk, the team notes.
“The result looks convincing and impressive,” says Michael Liu of the University of Hawaii in Honolulu, who was not part of the study. “The possibility of measuring the orbit over the next few years will be a great way to understand better how this object formed.”
Calling All Games
2010-10-04 08:56
We are looking for the team play,in order to highlight cool XNA.From this notice:
We are looking for some 2d and 3d game using game studio in the upcoming also show the great workMicrosoft outlookis convenient!
Our community has done,because we are publishing tools in a year ago.This is probably your and your chances
Enjoy the spotlight and any possible for the results.You will also have a chance
In the new XNA.Closed
On January 18,deadline is such,if you have a cool games already in good working condition,you may want to the pastOutlook 2010is powerful.
Current team's blog,complete information.
Jeff Utecht is a cool teacher very interesting blog.Jeff is a k-12 technical experts in Shanghai of americansMicrosoft Officeis so great!
Schools in Shanghai,China.I had met in his brief NECC and he is a very good man.He is very much to the topMicrosoft outlook 2010is the best.
Education technology development.So when he posted list technology related issues,guiders its not surprising
This is a big problem.
In this post a list,Jeff,a school has decided to study of the 21st centuryChooseOffice 2007 Professionalis the most lucky thing in the world.
Priority"should ask.Personally,I think the principal and the district must improve their sight
Science and technology competitiveness,especially young teachers'teaching.We won't accept ignorance of basic writing and mathematicsMicrosoft Office 2010is so great.
A teacher.We will accept the skills,they don't know how to use the basic research and teaching tool.Today theOffice 2007makes life great!
Basic research and teaching means more and more computers and related technologies.Can we really have technophobes didWindows 7is convenient and helpful!
Today the great work of the multimedia teaching,and online generation?Not easily.Office 2010is my favourite.
Check the problem.Jeff,They are correct?How will you add or subtract?Why?How much money do you still care
The teacher knows usign technology?I enjoy listening to the thought.Microsoft Office 2007is welcomed by the whole world.
A Fine Arts Degree in Computer Programming
2010-10-04 08:55
It has been nearly five months later,I wrote a new website called software,how to establish and many have begun
Then.They have increased a lot of new after interview with 5 December will reach 23.I know
Many of the new semester,some of you may be interested in these interviews.that
This website is what?From their web site.Office 2007 keyis available here.
How to establish a blog software by Microsoft to encourage community BBS source and proprietary dialogue
Software development model.Office 2007 downloadis on sale now!
The professional,Scott Swigart Sean Campbell was driving,this project.The purpose is to establish a BBS there is hope
Build a lively discussion and help the community from a large audience interest topic.continuous
Discussion held various industrial subject experts to help collect different perspectives are open
Proprietary software development model of source and.These texts are posted on this blog BBS.Office 2007 Professionalbring me so much convenience.
So there is interviewed the Microsoft and developers and other company(the sun and tulou,etcWindows 7is the best.
When people deeply involved in the development of the open source community.Good ideas are made.
CommentsComputer science education,Microsoft 0,open source,and education
I fear that if the OLPC project and expectation is a failure will continue to introduceBy usingOffice 2010 Professional,you can save your money and time.
Technology education.This will be a disaster.So I hope they succeed.I only wish I had more attention
Training teachers,so that they can be better"play"children start learning path.Let us giveBy usingOffice 2010 Professional,you can save your money and time.
children every advantage.
4 Commentseducation education technology,
Like many calculators teacher four-hire those knowledgeable programmers project as an introduction of programming concept
My students.Like the number keys to track 10 buttons can be a bit challenging courses.but
I usually use this project,I am most interested in a project,using the stack.Simple calculator
Good.Microsoft Office 2010is the best software in the world.
Many students once they implement basic add,subtract,multiply and divide functions began to seek additional
Functions to add.This is what I have been encouraging.The square root are often the first to add extra"features",because of themOffice 2010is powerful!
It can be simple through built-in functions.Occasionally I will add parentheses are students.It is a more advanced
And many understand math concepts and computer.Office 2007can make life more better and easier.
Recently,I met a post Raymond chan explains how to use the calculator Windows calculator.It's
In the same way,it most standard four-hire those knowledgeable programmers calculator can purchase.The surprising thing I is workableMicrosoft Office 2007is the best invention in the world.
Well,then,but different is,I think.I rarely use the keys,but now I know how it works,and I could only
Use it in the future.This shows,plus points key projects may be more of a calculator
I want to be effective.
Raymond job description arithmetic and logic in simple easy to understand.It is really useful,
Road.You can see in the practical work,is not only the function,why they participate in the algorithm,established
They.Microsoft Officeis helpful.
Also have many comments on his job,his interest.In fact,I can see them as the foundation
The key,and classroom discussion about how to feature points,calculator and other program design,overallMicrosoft outlook 2010is convenient!
Q:why some people seem to have never see the same value in a characteristic,is the creator's characteristic,what to do?
CommentsComputer science education programs,0 education,