Sam Eckholm on MSN

Watch a $500 million rocket launch begin with a 10-second countdown

Every U.S. Space Force launch is the result of months of planning, testing and coordination, yet the most critical moments ...

A new CRASH clock measures the chance of satellite collisions, and it's ticking down fast

Imagine a piece of space debris the size of a hockey puck slams into a Starlink satellite at about 10 kilometers per second. The kinetic energy is equivalent to 2 kilograms of TNT, or a fully loaded ...