Five planets revealed after 20 years of observation

To confirm the presence of a planet, it is necessary to wait until it has made one or more revolutions around its star. This can take from a few days for the closest to the star to decades for the furthest away. Only a telescope dedicated to the search for exoplanets can carry out such measurements over such long periods of time, which is the case of the EULER telescope of UNIGE.

from Top Technology News -- ScienceDaily http://bit.ly/2GrQG4D
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