Mark your calendar so you can catch Mercury, Venus, Jupiter, Saturn, Neptune and Uranus in the sky at the same time.

For decades, scientists puzzled over why Uranus seemed colder than expected. Now, an international research team led by the University of Houston has solved the mystery: Uranus emits more heat than it gets from the Sun,

A new study on Uranus has found it is hotter than we thought, prompting scientists to suggest we should return to the ice giant. While Mars, Jupiter, and Saturn are regularly visited by human spacecraft,

A planetary parade of six planets is visible in the morning sky through August 20, with Mercury joining Venus, Jupiter, Saturn, Uranus, and Neptune. August 18 to 19 offers the best viewing, when the crescent Moon aligns with Jupiter and Venus before shifting into a triangle formation later in the month.