Combining strict thinking with known imagination is useful, and the imagination pushes the researcher to new discoveries. Thus, Olbers expressed the bold idea that the place of the solar system, which some people gave only to the planet, was once occupied by a single planet. Two of them, discovered here — according to Olbers, — are the fragments of it, formed by some once catastrophic event. These fragments, perhaps, are not even two, but many, and it makes sense to look for the rest. If once a planet...

The discovery of the first interstellar comet is a very important event in itself, but many details of subsequent observations of the comet itself are also significant for science. By December 2019, it should be about 150-160 million kilometers closer to Earth, with the distance from the comet to the Sun being close to 300 million kilometers. At this distance, the radiation of our star will heat the "alien" enough to begin to actively evaporate almost all the volatile components. This is frozen carbon monoxide, carbon dioxide, water vapor, perhaps methane and much more...