Space agency is targeting Wednesday for the historic journey-its first to the moon in more than half a century.

NASA is tracking a plane-sized asteroid known as 2025 XM as it hurtles toward Earth’s neighborhood at roughly 9,753 miles per hour, a reminder of how busy and carefully watched our cosmic surroundings ...

A vast, magnetically tangled sunspot has rotated into direct view of Earth, raising the prospect of powerful solar eruptions in the coming days. The active region is large enough to dwarf our planet ...