The towering rocket NASA will use to help propel four astronauts on a historic trip around the moon is vertical on the launch pad, and you can see it anytime.

NASA's big moon rocket leaks a little bit, but it just might be ready to carry astronauts beyond Earth.

Perhaps the most important of these operations is fueling — loading up Artemis 2 's Space Launch System ( SLS) rocket with more than 700,000 gallons (2.65 million liters) of super-cold liquid oxygen a...