Together with precise optical ranging between selected satellites, this provides orbit determination capabilities with unprecedented accuracy. The Kepler infrastructure thus consists of three main ...

A 128-minute orbit, according to Kepler's third law, works out to a semi-major axis of 8,413 km (5,228 mi). Such an object with less than 0.25 eccentricity (a roughly circular orbit), therefore ...

Under the consolidated filing, the first tranche of Kepler’s optical data relay network will consist of 10 satellites on orbit, scheduled to be launched in quarter four of 2025. The filing also ...

Kepler 138 is a red dwarf star located 218 light-years away. Not far from our world, at least on the cosmic scale of the universe, a pair of Earth-sized planets orbit the Red Dwarf star Kepler-138.