The new tau Herculid meteor shower is forecast to peak soon.

All about meteors

Jupiter and Mars appear very close in the predawn sky.

Dwarf planet Pluto also may have a hidden ocean.

The average global temperature on this distant ice giant unexpectedly fluctuated during a recent 17-year period

Uranus was nearly named "George," a move that would have deprived comedians of 241 years of bad jokes.