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Six planets are set to align on Saturday, creating a planetary parade that will be visible to sky-gazers across the globe.

SAN FRANCISCO -- Venus and Mars, planet Earth's two closest neighbors, have been inching ever closer to each other during the month of July. Monday night, they promise to put on a show, appearing at ...

A large planetary alignment will be visible after sunset. Learn which planets you can see and when the next alignments happen.

When it comes to the question of which planet humanity could one day call home, the obvious choice might seem to be Mars. But surprisingly, Venus might actually be a better candidate for human ...

NORFOLK, Va. — This week will bring a celestial parade, full planetary alignment. The alignment will involve Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune appearing in an arcing line from ...

An international team of astronomers has discovered a distant planetary system that challenges long-standing theories of how ...

Six planets are visible in the night sky right now. On Feb. 28, Mercury will add a seventh planet to the planetary parade. Venus, Mars and Jupiter are 'great naked-eye targets' for beginning ...

Uranus and Neptune orbit in the dim, cold depths of the outer solar system. Neptune absolutely requires a telescope to ...

A collapsed lava tube detected in 30-year-old radar data from Venus may be part of a much wider network of underground caves.