and underwent two more dwarf nova events (in 1973 and 1991). Previous work on this bright system in quiescence (V = 13.5) has consisted only of a few isolated magnitudes, a few spectra and an ...

These planets might be practically “lost” for future ground observations ... (2018) discovered the 17 ± 1M Jup brown dwarf CoRoT-20c in the system. Its orbital period is 4.59 ± 0.05 years and it has ...

and it must have cleared its orbital path of debris. Pluto meets the first two requirements, but the third it does not. While ...

The Sun is the largest object in the Solar System. The Sun’s huge gravitational field keeps many other objects – planets, dwarf planets, asteroids and comets – in orbit around it.

As the gatekeepers to the Kuiper Belt, Charon and Pluto are a unique double dwarf planet system ... Knowing Charon's orbital period meant that astronomers could calculate good estimates of ...