Orbital resonance Resonance happens when planets or moons have orbital periods that are ratios of whole numbers. The orbital period is the time taken for a planet to make one complete circuit of the ...

A strange planetary system called TOI-201 is changing in real time, with three very different worlds pulling on each other.

Simple axioms can seem too simple. That was the case for aerospace engineer Max Fagin, when he encountered the rule of thumb that orbit at the surface level of rocky planets takes two hours. Dubious, ...

"Most planetary systems appear as 'peas in a pod.' This is not the case in the TOI-201 system." ...

The radius gap between super-Earths and sub-Neptunes Mass measurements using transit timing variations (TTVs) N-body simulations to model orbital dynamics and stability Atmospheric loss via ...

Astronomers from the University of Warwick have observed an exoplanet orbiting a star in just over 18 hours, the shortest orbital period ever observed for a planet of its type. It means that a single ...

Astronomers have found a key new system of six transiting planets orbiting a bright star in a harmonic rhythm. This rare property enabled the team to determine the planetary orbits which initially ...

In October 1995, after decades of serious effort, astronomers announced the first discovery of a planet orbiting a Sun-like star. Until then, the few planets known to exist beyond the solar system ...