The nights surrounding June 7 will see Jupiter and Mercury crowd together close to the horizon in the northwestern sky.

The planet's fast spin on its axis means that one Jupiter day lasts less than 10 Earth hours, and it sparks electrical currents that may drive the planet's intense and massive magnetic field ...

Temperature: The average temperature at the top of clouds on Jupiter is –244° F (–153° C). Escape velocity: To escape Jupiter’s gravity, you have to travel 133,100 miles (214,200 km) per ...

Knowing Jupiter's early spin also helped them calculate its size. By applying the physics rules of spinning objects, they figured out how big Jupiter had to have been to match that rotation.

For more stories like this, follow us on MSN by clicking the +Follow button at the top of this page. Mercury and Jupiter will fit within the field of view of a pair of 10x50 binoculars (denoted by ...