Research fellow from Pulkovo observatory Vadim Bobylev found out that an orange dwarf star Gliese 710 would come very close to our Sun during next 1.5 million years.
      
      This conclusion is based upon data on movement of about 35 000 stars, which are located close to our star, collected by Hipparcos, a satellite of European Space Agency. The astronomer’s great interest was in stars, which could pass close to the Sun, and he used computer modeling to determine such stars.
      
      Vadim Bobylev calculated that there was an 86 percent chance of Gliese 710 entering Oort Cloud, located less than 2 light years from our Sun, in 1.45 million years with error of 0.06 million years. The Oort Cloud is a source of long-period comets, and the collision can generate a lot more comets, flying towards our planet.
      
      There also is a non-zero probability of Gliese 710 passing so close to the Sun that it would affect objects of Kuiper belt, which is also a source of comets.
      
      Source: Science News