Kepler-421b [SEP] time of discovery
Kepler-421b
Kepler-421b is an exoplanet that, as of July 2014, has the longest known year of any transiting planet (704 days), although not as long as the planets that have been directly imaged, or many of the planets found by the radial-velocity method, or as long as some transiting planet candidates which are listed as planets in the Extrasolar Planets Encyclopaedia (KIC 5010054 b etc.). It is the first transiting-planet found near the snow-line.
Normally, at least three transits
the "most precise measurement" so far attained for the size of an exoplanet (Kepler-93b); the discovery of an exoplanet (Kepler-421b) that has the "longest known year" (704 days) of any transiting planet found so far; and, the finding of "very dry atmospheres" on three exoplanets (HD 189733b, HD 209458b, WASP-12b) orbiting sun-like stars.
- A new report from Stanford University warns that biodiversity is reaching a tipping point that will lead to a sixth mass extinction.