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 […]

Read More How to land a rocket?


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 […]

Read More Saturn

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 […]

Read More Einstein’s ring

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. […]

Read More Photographing a black hole

Mars 2020 helicopter

The last space probe sent to mars was InSight a week ago, but we said, it is not a rover, but a lander, that cannot move along the surface.  The last rover sent to Mars was the Curiosity rover in 2011, but NASA has in plan sending the Rover “Mars 2020” in the year 2020. […]

Read More Mars 2020 helicopter


Jupiter is the 5-th planet and first gas giant from the sun in our solar System. It is 11 times the diameter of Earth and almost 2.5 times the combined mass of the other seven planets of the Solar System. Its vast globe has a distinctively banded atmosphere that is affected by storms and winds […]

Read More Jupiter