Image of the Day: RS-25 hot fire

Credit: Aerojet Rocketdyne

The RS-25 is better known as the main engine of the space shuttle, one of the most complex and powerful and generally stupendous things that humanity has ever created. And it certainly does photograph well at full throttle, even just on a test stand:

Enjoy your look at this engine while it lasts; the RS-25s are being recycled to power NASA's Space Launch System, which features an expendable main stage to reduce cost and complexity. This means that after they next power a spacecraft into orbit, they'll fall back into the ocean, never to be seen again.


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