A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

A small team led by Sihao Cheng, Martin A. and Helen Chooljian Member in the Institute for Advanced Study's School of Natural ...

Pluto has become a beloved object in our solar system ever since the International Astronomical Union (IAU) reclassified it from a planet to a dwarf planet back in 2006 – a decision which has ...

Sea levels will rise — by metres, not centimetres — and the time to prepare is now. Drawing on ancient clues and the latest ...

A Tucson man was convicted this week in the killing and dismembering his 17-year-old cousin in 2020 ... her loved ones," the Pima County Attorney's Office said Tuesday in a news release.