The influence of the sun spreads very widely, as the distance where it stops and starts the gravitational influence of the influence of other stars and the whole mass of our Galaxy. Reliable information about how this is, not yet, although visitors from these spaces from time to time visit the solar neighborhood. Guests – long-period comets, moving in highly elongated orbits.
Thousands of ice chunks break in the inner solar system, representing a serious threat to the planet and, in particular, for the earth. The fall of a large comet or asteroid could cause catastrophic consequences for our planet. According to scientists in the past this happened repeatedly, causing a mass extinction of species.
Among the data collected by orbiting telescope WISE, the scientists are going to find confirmation of the existence of a hypothetical large planets at the farthest boundaries of the solar system.