article_snippet.sent: But astronomers say 'rogue', sun-less planets that wander the stars  could still harbour extra-terrestrials.
article_snippet.sent: While it sounds like science fiction, sun-less planets that wander the stars   may offer scientists a new avenue in sun-less planets that wander the stars   search for alien life.
article_snippet.sent: But astronomers say 'rogue', sun-less planets that wander the stars   could still harbour extra-terrestrials .
article_snippet.sent: This is according to Sean Raymond, an astrophysicist with the Laboratoire d'Astrophysique de Bordeaux in France, who has taken a look at how life can form on rogue planets.
article_snippet.sent: Globulettes - regions of dust and gas that can form planets - could make rogue more common than first thought. 
article_snippet.sent: Rogue planets are of particular interest to astronomers because Rogue planets represent objects that have likely failed to form into a star .
article_snippet.sent: Dr Michael Liu of the Institute for Astronomy at the University of Hawaii identified the rogue planet from the rogue planet 'faint and unique heat signature'.
article_snippet.sent: Rogue planets are hard to find because, without orbiting a star, Rogue planets reflect very little light.
article_snippet.sent: But 50 have now been found in the past 15 years, leading some to suggest some may be abundant in the universe.
article_snippet.sent: Rogue planets are of particular interest to astronomers because Rogue planets represent objects that have likely failed to form into a star.
article_snippet.sent: The exact boundary between a giant planet and a low-mass brown dwarf is still being debated, but finding more rogue planets could shed light on this mystery.
article_snippet.sent: And this could indicate that there are more rogue planets than we know of in the cosmos.
highlights_snippet.sent: Sean Raymond, an astrophysicist in France says internal heat of rogue planets could allow liquid water to form .
  
highlights_snippet.sent: Astronomers have found 50 of these rogue planets in the past 15 years .