Scientists have discovered 27 potentially free-floating planets: they do not have their own star

The research team found 27 short-lived signals that potentially indicate

free-floating planets. Many of these objects have been previously seen in other observations. Four of these planets have a mass close to Earth's. 

It is possible that such planets originally formed around the host star, and then were literally squeezed out by the gravitational pull of heavier planetsin the system.

In a study by Ian Macdonald ofFrom the University of Manchester, 2016 data were used during the K2 phase of NASA's Kepler Space Telescope. During this two-month campaign, Kepler tracked a field of millions of stars near the center of our galaxy every 30 minutes to detect rare gravitational microlensing events.

These new developments were not accompanied by the long signal that might be expected fromhost stars, so scientists have concluded that these planets haveStars. 

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