Assertion: star's planet | /r/HasProperty | detected
Facets:
Source sentences:
text: Radial velocity measurements of Alpha Centauri B made with the High Accuracy Radial Velocity Planet Searcher spectrograph were sufficiently sensitive to detect a 4 M ⊕ planet within the habitable zone of the star (i.e. with an orbital period P = 200 days), but no planets were detected.