UFO News3 Number of potentially habitable planets in our galaxy: Tens of billions

[Alta Vista [Bot]]

It is one thing to observe the periodic dimming of a star’s light, as NASA’s Kepler Space Telescope has done for thousands of planet “candidates” since its launch in 2009. However, to confirm that such dimmings are in fact due to a planet passing in front of a star, as opposed to any number of false positives such as a binary star companion, requires intensive follow-up work with ground-based instruments, most often a measurement of radial velocity to determine the object’s mass. Continue reading Number of potentially habitable planets in our galaxy: Tens of billions at Alien UFO Sightings.

Source: http://alien-ufo-sightings.com/2018/05/ ... -billions/