Three basic principles govern the course we recommend. The first is the “flexible path” approach that the Augustine commission advocated and that President Obama and Congress accepted.

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by 刘貂儿 | 2013-07-17

MANY a youngster, Babbage included, has dreamed of going into space. But becoming an astronaut is a hard slog. Sandy Antunes suggests a less daunting proxy. An astrophysicist and programmer with decades of NASA experience, Dr Antunes is a proponent of pic

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by Jane | 2013-10-08

I get excited when I see astronomers using novel techniques to study more distant and more difficult problems in astronomy. In this case, we have a galaxy cluster acting as a lens and some high-resolution spectroscopy to get a 3-dimensional view of a quas

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by 刘貂儿 | 2013-07-17

MANY a youngster, Babbage included, has dreamed of going into space. But becoming an astronaut is a hard slog. Sandy Antunes suggests a less daunting proxy. An astrophysicist and programmer with decades of NASA experience, Dr Antunes is a proponent of pic

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by 刘貂儿 | 2013-07-17

NASAs Cassini spacecraft obtained this image of a feature shaped like a hot cross bun in the northern region of Titan (left) that bears a striking resemblance to a similar feature on Venus (right). Image Credit: NASA/JPL-Caltech/ASI This image from NASAs

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by 刘貂儿 | 2013-07-17

There is not one universe—there is a multiverse. In Scientific American articles and books such as Brian Greene’s latest, The Hidden Reality, leading scientists have spoken of a super-Copernican revolution. In this view, not only is our planet one among m

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