A distant planet with a helium-filled atmosphere that has swollen into the shape of a balloon has been discovered by astronomers.
Ever since Pluto was downgraded and given the “dwarf planet” status in 2006, debates have been raging among the scientific community about whether the decision was justified.
The sun is losing mass and weakening its grip on the solar system, scientists have found, after analysing Mercury’s orbit.
Space dust may have transported alien bugs to Earth – or terrestrial microbes to other planets, research suggests.
A newly discovered planet orbiting a nearby star could be the closest world to Earth offering life a comfortable home.