The BE-4s will be used in Blue Origin’s New Glenn rocket, which founder Jeff Bezos hopes will one day shuttle humans to and from the moon. In true Bezos fashion, the announcement was made without notice on his personal Twitter account.

According to Blue Origin’s website, not only will the BE-4 end America’s reliance on the Russian RD-180 engine, it requires no taxpayer dollars, since it’s entirely funded by the private sector. To top it all off, two of these bad boys provide up to 1.1 million pounds of thrust—not too shabby.

Source: Blue Origin Just Teased a Photo of Its Big Ass Rocket’s Engine