Will we ever travel to other stars?

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Today, we are speaking about space tourism, or sending men to Mars. What about longer, much longer journeys, out of our solar system? Of course, the question has been around for quite some time, and it seems that space agencies are more and more interested in the idea. When reading …

Cosmology – The theoretical minimum

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A bit more than a year ago, while browsing the Stanford University online resources, I came across a series of lectures about cosmology; I thought some of you might be interested, so I decided to share it with you here. It is actually part of a six-quarter sequence of classes …

The fate of the Universe

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When thinking about the Universe and looking at the sky, a natural question comes to everyone’s mind: how did all of this begin?
It is today commonly accepted that everything started with the Big Bang, a primordial explosion from which the Universe we see today has expanded.
On the other hand, you …

Five astronomical events you don’t want to miss

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Even though dark places like Sark are becoming more and more rare, when fewer and fewer people seem to take some time to look up at the stars, human beings have always been fascinated by the sky, using it to navigate, measure time or just enjoy the view.
And when it …

Black Holes – Part III

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In this third and last part of the article dedicated to black holes, I will describe what would happen to someone traveling through a black hole.
Gravitational time dilation and gravitational redshift
First, I will start by describing two important effects: gravitational time dilation and gravitational redshift (I will spare you the …

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