How to land a rocket?

We sent lots and lots of rockets in space. Manned or unmanned missions.  Every  mission we sent to space has some stages, where, after the full rocket escapes Earths atmosphere, the main body, with the tank fuel and engine, is detached from the capsule, that will go on its mission.  The main body will begin […]

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Famous for its impressive rings, Saturn is the sixth planet fom the Sun and the second largest in the Solar System (after Jupiter), with an equatorial diameter of 74,898 miles (120,536km). It consists almost entirely of the lightest elements, hydrogen and helium, as a result of which it is the least dense planet in the […]

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Einstein’s ring

Imagine we have a elastic sheet, that represents space-time, like a trampoline. You put there an object with big mass, like a bowling ball. The trampoline will bend and if you put an object with smaller mass, like a ping ping ball close to it, the small object will go towards the object with the […]

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Photographing a black hole

We look up in the sky and see, with naked eye or with telescopes, planets, stars, nebulaes and whole galaxies. What no man has ever seen is black holes. We know that they exist. Black holes are formed when a massive star dies in a Supernova, all its mass being collapsed in the singularity point. […]

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