A planet-sized visitor possibly visited the solar system billions of years ago and permanently changed the cosmic neighbourhood by warping the orbital path of four outer planets of the system, a ...
the planet-sized object's path altered the orbits to approximately their current state. The visitors in 1% of simulations dove straight into the solar system, travelling past Uranus' orbit and ...
Mars, Venus, Jupiter, Saturn, Uranus and Neptune will appear together in a row throughout the start of February – although Neptune and Uranus will only be visible with binoculars or a telescope.