galaxy

We Are All on Mars

Isn’t it fantastic? We are all on Mars! Yes, you too! You cannot directly feel the wind of the thin atmosphere on your hand in the freezing temperature. You cannot feel the lack of oxygen by breathing in the carbon dioxide rich atmosphere or jump high under weak gravity at the red Sunrise over the …

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Our Cosmic Origins

What is the cosmic origin of the elements in the human body? We know we are made of stars. But what kind of stars? You are made of elements that have been forged in exploding massive stars, in slowly dying low-mass stars, but also exploding white dwarfs, and merging neutron stars. On top of all …

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“Robots will colonize space, without human beings”

Robots will colonize space, without human beings There’ll be a new civilization, the sum of human intelligence and artificial intelligence, where artificial intelligence will be able to analyze a problem, identify the resources needed to deal with it, plan a strategy, adapt and improve itself to resolve the problem.” It will do this not only …

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Are We Better Than The Dinosaurs? They Didn’t Have Telescopes

The only difference between us and the dinosaurs is that they didn’t have telescopes! There are millions of asteroids that can be fatal to humanity and we only know a fraction of them. If we want to prevent going the way of the dinosaurs, we have to get serious about mapping asteroids. More in general, …

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A sky really full of stars

One of the favourite sci-fi scenes is that of the sky in the center of the Galaxy, which now has taken a newly visible form. Thanks to Slashdot, I have found a video of the movement of the stars closest to the black hole in the center of the Milky Way. Really fascinating to see …

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Just because it’s hard, you can’t ignore it…

The solutions of the equations of General Relativity are hard, and it is not surprising that only special cases have been analysed in detail. It is more surprising however that the professional cosmologists have chosed to treat an entire Galaxy with just the Newtonian mechanics, and when the results didn’t conform to the measurements, they …

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