SimilarityRank
PCGS 0.760 53733
nebula 0.704 49393
Messier 0.689 84442
nebulae 0.687 81004
CAC 0.682 35207
Nebula 0.660 48795
galaxies 0.649 19979
Hubble 0.637 35333
globular 0.637 65901
Telescope 0.633 33291
ISON 0.628 79144
quasars 0.621 93060
Comet 0.618 30602
ESO 0.610 82637
exoplanets 0.603 89365
CMB 0.602 90582
SN 0.598 47787
supernova 0.597 46579
comet 0.589 23908
Astronomers 0.584 61630
redshift 0.582 88264
Saturn's 0.582 60708
telescopes 0.581 27127
orbiting 0.577 32947
Ursa 0.577 89545