In each era, people in their dreams solved the problem of contacts with aliens, based on the technology of their time. Until the 18th century, people believed that the energy of muscles, their own and domestic animals would be enough to fly to the stars. And therefore, even fantasizing, the only thing they could offer was just a crew harnessed … to a flock of birds. Our distant ancestors did not know that the air would end immediately, when you “fly away from home”. They did not even imagine the enormous distances separating us from the moon and planets, not to mention the distances to the stars. Then, having measured these distances and having learned that almost empty, airless space divides celestial bodies, they began to dream at least of mutual signaling.
In the XIX century, just a hundred years ago, everyone seriously believed in the existence of Martians. And then, quite seriously, scientists put forward assumptions about the optical connection with them. The mathematician Karl Gauss proposed cutting a triangle in the Siberian forests a multimeter in the form of a triangle and planting it with Continue reading
The formation of astronomy as an exact science began thanks to the work of the outstanding Greek scientist Hipparchus. He first began systematic astronomical observations and their comprehensive mathematical analysis, laid the foundations for spherical astronomy and trigonometry, developed the theory of the motion of the Sun and the Moon, and on its basis – methods for predicting eclipses.
Hipparchus discovered that the apparent movement of the sun and moon in the sky is uneven. Therefore, he came to the point of view that these luminaries move uniformly in circular orbits, but the center of the circle is shifted relative to the center of the Earth. Such orbits were called eccentrics. Hipparchus compiled tables by which it was possible to determine the position of the sun and moon in the sky on any day of the year. As for the planets, according to Ptolemy, he “made no other attempt to explain the motion of the planets, but was content to tidy up the observations made before him, adding to them even more of his own. He limited himself to pointing out to his Continue reading