Scientists have discovered that a distant "hot Jupiter" world has a planetary companion. The two planets are locked in a rhythmic dance around the star TOI-1408, located 455 light-years from Earth.
First discovered just last year using NASA's exoplanet-hunting spacecraft, TESS (Transiting Exoplanet Survey Satellite), TOI-1408 b is a gas giant planet that is over twice the width of Jupiter and almost twice the mass of the solar system gas giant. It orbits its parent star at a distance of 5.3 million miles, about 6% of the distance between Earth and the sun. This means TOI-1408 b completes an orbit in just 4.4 Earth days.
