This schematic shows the positions of the four exoplanets orbiting far away from the nearby star HR 8799. The orbits appear elongated because of a slight tilt of the plane of the orbits relative to our line of sight. The size of the HR 8799 planetary system is comparable to our solar system, as indicated by the orbit of Neptune, shown to scale.
Credits
Image
NASA, ESA, Rémi Soummer (STScI)
