How do you prepare a 20-story-tall rocket to launch one of the heaviest commercial satellites in history? Watch this video to find out the process that ULA is using to ready its powerful Atlas V 551 rocket to deliver the ViaSat-3 F2 satellite into space tonight. bit.ly/av_viasat | United Launch Alliance

13K views · 6K reactions | China just launched the last satellite to complete its own global navigation system, Beidou. The fixed cam on rocket captured the entire process from launching to orbiting. | Xu Zeyu | Facebook

25K views · 411 reactions | Test fire of NASA's RS-25 rocket engine, the engine that is to be used on NASA's Space Launch System, and was used in an older varient for the space shuttle. | Popular Mechanics | Facebook

1.7M views · 38K reactions | Building the ULTIMATE DIY ROCKET ENGINE | The Backyard Scientist | Facebook

4K reactions · 122 shares | Asia's largest test stand for liquid-propellant rocket engines, with a load capacity of up to 700 tonnes of thrust, successfully completed its first trial run on April 24. Officials say it marks a breakthrough in developing liquid propellant engine infrastructure and testing capabilities in China. | CGTN | Facebook