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SpaceX Falcon Heavy: How it stacks up with other massive rockets

SpaceX launched its new rocket on an uncrewed test flight from Kennedy Space Center on Tuesday.The private spa...

Posted: Feb 6, 2018 3:31 PM
Updated: Feb 6, 2018 3:31 PM

SpaceX launched its new rocket on an uncrewed test flight from Kennedy Space Center on Tuesday.

The private space company says the rocket, called Falcon Heavy, is the most powerful rocket in use today.

It is not, however, bigger or more powerful than the mighty Saturn V that was used to launch the Apollo astronauts to the moon in the '60s and '70s and then to launch the Skylab space station in 1973.

And there are plans for a few other rockets that could one day rival the Falcon Heavy.

Here's how some of the biggest U.S. rockets -- of the past, present, and future -- stack up.

Falcon Heavy

Status: First test flight took place February 6

Height: 229.6 feet (70 meters)

Liftoff thrust: 5 million pounds

Capability: 140,660 pounds (63,800 kilograms) to LEO

(Note: Capability refers to the maximum payload weight the rocket can deliver to Low-Earth Orbit.)

Planned payloads: One Tesla (dummy payload), satellites, cargo, astronauts, tourists

Space Launch System

NASA is building the Space Launch System, a rocket designed to take people into deep space and potentially Mars. The space agency will be able to configure the rocket differently for each mission.

Status: No earlier than late 2019

Height: 322 - 365 feet (98.1 - 111.3 meters)

Liftoff thrust: up to 11.9 million pounds (5 million kg)

Capability: 150,000 - 290,000 pounds (70,000 - 130,000 kilograms) to LEO

Planned payloads: Cargo, astronauts

Saturn V

Even after the Falcon Heavy launches, the Saturn V will remain the tallest and most powerful rocket ever, and the only one to help carry humans beyond Earth's orbit. NASA used the Saturn V to send astronauts to the moon in the Apollo 11, 12, 14, 15, 16 and 17 spacecraft.

A Saturn V also launched Apollo 13, but the spacecraft (not the rocket) had a problem and the astronauts didn't land. The last Saturn V was used to launch Skylab, America's first space station, on May 14, 1973.

Status: Retired in 1973

Height: 363 feet (111 meters)

Liftoff thrust: 7.6 million pounds (3.4 million kilograms)

Capability: 260,000 pounds (118,000 kilograms) to LEO

Payloads: Apollo spacecraft and astronauts, Skylab

New Glenn

Blue Origin -- the space startup created by Amazon's Jeff Bezos -- has a small, reusable rocket to send paying tourists on trips to sub-orbital space. But, the company also has plans for a monstrous new machine that can send people and payloads to Earth's orbit. It'll come in two configurations: one with two stages and another with an added third stage for extra boost.

Status: First test flight no earlier than 2020

Height: 326 feet (99.4 meters)

Liftoff thrust: 3.9 million pounds (1.8 million kilograms)

Capability: 10,000 pounds (4,500 kilograms) to LEO

Planned payloads: Satellites, humans

Delta IV Heavy

SpaceX's competitor, United Launch Alliance, has the Delta IV Heavy. This rocket was first tested in 2004 and it's taller than the Falcon Heavy, but SpaceX is promising to take up heavier payloads. The Delta IV Heavy doesn't fly often, but it's been the U.S. military's go-to rocket for sending large national security satellites into orbit.

Status: Currently operational

Height: 235 feet (71.6 meters)

Liftoff thrust: 2.1 million pounds (1 million kilograms)

Capability: 62,500 pounds (28,000 kilograms) to LEO

Payloads: Satellites

Vulcan

United Launch Alliance is developing a new generation of rockets, dubbed Vulcan after the Roman god of fire. The concept was first announced in 2015, and CEO Tory Bruno has said the most powerful version of the Vulcan could rival the Falcon Heavy's power. The Vulcan can add thrust by strapping extra rocket boosters to the sides of its main column.

Status: First test flight no earlier than 2020

Height: 228 ft (69.5 meters)

Liftoff thrust: 3.8 million pounds (1.7 million kg)

Capability: 80,000 pounds (36,000 kg)

Space Shuttle

Space Shuttle refers to the reusable spacecraft system that NASA developed to send people and payloads into orbit between 1981 and 2011. The systems consisted of a white winged "Orbiter" with powerful engines that attached to a massive external fuel tank and two rocket boosters on the launch pad. There were five "Orbiters" capable of spaceflight -- Columbia, Challenger, Discovery, Endeavour and Atlantis.

Status: Retired in 2011

Height: 184 feet (56.1 meters) including external tank

Capability: 65,000 pounds (2,900 kilograms) to LEO

Liftoff thrust: 7.8 million pounds (3.5 million kg)

Payload: Astronauts, experiments, supplies, other cargo, satellites

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