In several billion years, the sun will explode and obliterate the inner terrestrial planets. This is fact. However, within those years, I am sure we will already be exploring the stars like our famed fictional character captain Jean-Luc Picard aboard the U.S.S. Enterprise. Our species will most likely propagate to another solar system within the Milky Way and settle colonies wherever.
Though colonization of space in different pre-determined sectors of space may upset the local natives (although I don't believe we'll encounter any species such as Klingon or Vulcan), we must be prepared to handle such situations so our neighbors do not create neutral zones or declare war on our terran system to try and invade/destroy Earth.
Who knows, the Enterprise carrier was named in honor of Star Trek, perhaps Star Fleet and the Federation will be created in alliance with other species we will discover in time. And hey, we do not have to tell the species we ally with that we got our names and ideas from an individual who had been dead for an enormous amount of time from that of media entertainment back in the late 20th century.