elnetrino

I remember the time when I begun my astronomical observations, one brilliant book that covers a wide range of subjects on this topic: The Backyard Astronomer's Guide by Terence Dickinson & Alan Dyer. After the years, this remains at the front line in my library. Highly recommended.

Thank you for the reference to the forum's rules and sorry for the links. It will not happen again.

I want to buy a special science related gift for my daughter (8 years old) and here is my top 5. A solar system model like this: Copernican Orrery Kit (url removed by moderator) A book with experiments like this: Science in Seconds for Kids: Over 100 Experiments You Can Do in Ten Minutes or Less (url removed by moderator) A wall decal like this for her room: Science Niels Bohr's inspiring quote with particles' collision vinyl wall decal (url removed by moderator) A magazine subscription (like Popular Science) A cool t-shirt like this: Boson Higgs T-shirt (url removed by moderator) Any suggestions would be much appreciated. Thank you in advance

My top five: Being and Time - Martin Heidegger The Character of Physical Law - Richard Feynman The Selfish Gene - Richard Dawkins 2001: A Space Odyssey (1968) - Arthur C. Clarke Memory, History, Forgetting - Paul Ricoeur

I agree with imatfaal. Darkness is lack of light. In order for an observer to observe and 'see' the darkness of a subject, that subject should not emit any visible light towards the observer. See for example in a recent Astronomy Picture of the Day the dark Pipe Nebula http://apod.nasa.gov/apod/ap121123.html

Try to use datasets where the documents are classifiied into known categories, i.e. datasets used for classification experiments. This is a nice way to examine the results of clustering algorithms. Use a k-means and initialize it with observations from each class. You can also specify number of clusters equal to the number of classes, and see if the clusters that are created match the classes.

In my opinion, whether reality 'is' digital or analog, Id like to believe that we are experience it as an awesomely analog symphony. Which brings to my mind a quote form the movie Contact, where Ellie said "No words to describe it. Poetry! They should've sent a poet. So beautiful. So beautiful... I had no idea."

Hello everyone, I'm amateur astronomer and I love science. I also enjoy science fiction and science related art. Thank you, Anthony