Observatorium Arecibo

It was to solve the problem of spatial resolution that in 1960 William E.Gordon of Cornell University proposed to build the Arecibo antenna 305 m in diameter in Puerto Rico. The place was chosen because it is the American territory (with Commonwealth status) located closest to the equator which also facilitates the study of planets …

The Theoretical Models

Apart from optical telescopes equipped with their detectors and other spectrographs, to carry out their research, astronomers also need theoretical tools, especially models and statistical functions. Indeed, the problem for an astronomer is not only to be able to observe the objects furthest from the Universe to specify its evolution but especially to be able …

Spectroscopy

In 1666, during an optical experiment that he later described as “crucial,” Newton discovered the specter of light by playing with a prism in a darkened room. Although his experience will be criticized by the Roman clergy until the early eighteenth century for its theological consequences (the white light was not pure, immaculate, but composite), …

Professional Astronomy

When you see the size of small astronomical instruments sold in specialty stores, they only impress novices. On the other hand, a telescope of 200 mm in diameter measuring between 1.5 and 2 m in height like the one presented above on the left intimidates already an amateur informed by its proportions and the quality …

Sky Surveyors

As the day dies, on the promontory of a mountain at the forefront of the universe, a dome opens. In the reddish opening is a telescope with unusual dimensions. Moments later, the giant’s bright eye comes to life, looking towards infinity. Mechanically we follow his movements and a question comes naturally to our mind: What …