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SpaceX workers crawl the lower section of the Test Hopper out to a launch pad near Boca Chica Beach, Texas, on March 8, 2019.

Elon Musk: SpaceX hopes to launch ‘Test Hopper’ — a prototype for a giant Mars rocket ship — for the first time this week

SpaceX's "Test Hopper" is a prototype for a Mars launch system called Starship. The vehicle may see its first rocket-engine test-firing as soon as March 18.
The first firing of SpaceX's full-scale Raptor rocket engine, which is designed to help send passengers around the moon.

SpaceX test-fired a giant rocket engine with ‘insane power’ for moon and Mars missions. The future of Elon Musk’s company may ride o...

Elon Musk posted videos of SpaceX's new Raptor rocket engine firing. Experts say the company's future depends in part on the engine's reliability.
An illustration of Boeing's CST-100 Starliner spaceship flying around Earth.

Leaky valves on Boeing’s new spacecraft are increasing the risk that NASA astronauts could lose access to the space station

Boeing has provided new details about a fuel leak with its spacecraft, called the CST-100 Starliner, which will result in delays of crucial tests. If Boeing or SpaceX can't certify its spaceships by the end of 2019, NASA might temporarily have no way to reach the International Space Station.
NASA is modifying and testing space shuttle engines for use on its new Space Launch System mega-rocket.

NASA just fired an old space shuttle engine at ‘113% thrust’ — and plans to use it on a new mega-rocket

The space agency is modifying old space shuttle engines for use on SLS, a 321-foot-tall mega-rocket that might send astronauts to the moon and Mars.
A Falcon 9 rocket uses its nine Merlin engines to launch a satellite into space on July 5, 2017.

SpaceX’s next-generation rocket engine blew up during a key test

SpaceX's Texas facility was testing an upgraded Falcon 9 rocket engine when it exploded on its stand, inflicting damage that will take weeks to repair.
An illustration of ULA's Vulcan rocket launching toward space. (In this image, used-up rocket motors are falling back to Earth.

SpaceX’s biggest rival has a ‘genius’ plan to cut its rocket-launch costs by more than 70%

United Launch Alliance's Vulcan rocket is designed to parachute its giant engines back to Earth for reuse, lowering launch costs to $100 million a mission.

The US Air Force is willing to spend $738 million to solve one of America’s biggest rocket problems

Two companies are now on a race to build an American rocket engine.