Knowtex

The countdown clock is one of the most-watched timepieces in the world. On this page, you'll learn how the countdown operates, and what milestones to watch for during our live launch coverage.

Every possible stage of a Space Shuttle mission explained.

On the 25th anniversary of the space shuttle disaster, find out what really happened to Challenger. For starters, there was no explosion.

Overview of a space shuttle landing processing, from deorbit to post-landing operations.

Video with slow motion on the firing of liquid rocket engines of the space shuttle and its launch.

Décollage d'une navette spatiale, avec ralentis et angles de vue non conventionnels. De superbes images.

View from the crew cabin as we reach for the stars.