When the earth is at perihelion, it is having its closest encounter with this
Watching Comet 
ISON with the SDO spacecraft, at perihelion .... She has won a galaxy of awards 
from the broadcasting and science communities, including having... [DOC] [TLE] Scientists to get ringside view as comet 67P reaches closest point to ... [PAR] Aug 8, 2015 ... On Thursday, when the comet reaches perihelion, its closest