Did you know…
Space: questions and answers
The most searched questions about Space, with a direct answer, an explanation and sources.
Rockets and launches
Why does a rocket launch into space?
A rocket launches into space because it is the only practical way to reach orbital speed. Orbit is less about altitude than velocity: a satellite must travel… more…
Rockets and launches
How does the saturn v work?
Saturn V worked by staging: a kerosene first stage with five F-1 engines (about 34,000 kN) lifted the 2,800 t rocket for two and a half minutes, a… more…
Rockets and launches
Why do rockets launch from florida?
Rockets launch from Florida because the Cape sits at 28.5 degrees north, low enough to gain about 410 m/s from the Earth's rotation on an eastward launch, and… more…
Rockets and launches
How much a rocket weight?
Rockets range from about 13 t for Rocket Lab's Electron to roughly 549 t for Falcon 9, 2,800 t for Saturn V and close to 5,000 t for Starship with its Super… more…
Rockets and launches
Why does a rocket curve?
A rocket curves because orbit is a matter of sideways speed, about 7.8 km/s for low Earth orbit, not of altitude. It rises vertically only long enough to… more…
Rockets and launches
What was the largest rocket ever made?
The largest rocket ever built is SpaceX's Starship: about 123 m (403 ft) tall, close to 5,000 t at liftoff and roughly 74 MN of thrust from 33 Raptor engines… more…
Rockets and launches
Why is voyager 1 so fast?
Voyager 1 travels at about 17 km/s (61,000 km/h) relative to the Sun because it was launched on a Titan IIIE-Centaur in 1977 and then gained speed from… more…
Rockets and launches
When did starship troopers come out?
Starship Troopers is a film, not a rocket: Paul Verhoeven's adaptation of Robert A. Heinlein's 1959 novel opened in US cinemas on 7 November 1997. It has no… more…
Rockets and launches
How much did the space race cost?
The American side is documented: Project Apollo cost about 25.4 billion dollars as reported to Congress in 1973, roughly 257 billion in 2020 dollars, with… more…
Rockets and launches
How much a rocket launch cost?
A launch is priced by capacity: about 7–8 million dollars for a small Electron, roughly 70 million for a Falcon 9 and close to 100 million for a Falcon Heavy… more…
Rockets and launches
Why does a rocket launch straight up?
A rocket lifts off vertically to get out of the dense lower atmosphere as fast as possible, where drag and aerodynamic loads are highest, and to leave the pad… more…
Rockets and launches
Why is a rocket launching today?
Because orbital launches are now near-daily events: 2024 saw around 260 orbital launch attempts worldwide, about half of them by SpaceX's Falcon 9, largely to… more…
Rockets and launches
Largest rocket ever built?
By every measure the largest rocket ever built is SpaceX's Starship with its Super Heavy booster: more than 120 m tall, about 5,000 tonnes at liftoff and… more…
Rockets and launches
How much does the biggest rocket weigh?
The heaviest rocket ever built is SpaceX's Starship, which weighs close to 5,000 t fully fuelled on the pad; more than 90 percent of that is liquid methane… more…
Rockets and launches
How does starship land?
Starship lands propulsively. The Super Heavy booster flies back, slows with a landing burn and is caught in the air by the arms of the launch tower, first… more…
Rockets and launches
Why does a rocket launch?
A rocket launches because its engines push exhaust gas downward at very high speed, and by Newton's third law the gas pushes the rocket upward with an equal… more…
Rockets and launches
What does the saturn v look like?
Saturn V looked like a white needle 110.6 m (363 ft) tall and 10.1 m wide at the base, painted with black roll-pattern stripes, the words UNITED STATES and… more…
Rockets and launches
How much falcon 9 launch cost?
SpaceX lists a standard Falcon 9 mission at 69.75 million dollars, with the booster recovered (data as of January 2025). Small satellites can share a ride… more…
Rockets and launches
What are the biggest rocket companies?
By launch volume the biggest rocket company is SpaceX, which flew more than 160 orbital missions in 2025, far ahead of anyone else. The other major players… more…
Rockets and launches
What are the biggest rockets?
By size and thrust, the biggest rockets are SpaceX's Starship (about 123 m tall, roughly 74 MN of liftoff thrust), NASA's Saturn V (110.6 m, 34.5 MN, 140 t to… more…
Rockets and launches
How much does the saturn v weigh?
A fully fuelled Saturn V weighed about 2,900 tonnes (some 6.4 million lb) at liftoff for the Apollo lunar missions, with propellant accounting for almost all… more…
Rockets and launches
What is the biggest rocket ever made?
Starship is the biggest rocket ever made: the full stack with the Super Heavy booster stands more than 120 m tall, has a liftoff mass near 5,000 tonnes and… more…
Rockets and launches
Why is falcon 9 launching?
Falcon 9 launches so often because it is the workhorse of SpaceX's own Starlink network: about two thirds of its flights carry Starlink satellites, several… more…
Rockets and launches
How much a rocket ship cost?
There is no single price: a small orbital rocket such as Rocket Lab's Electron sells for roughly 7–8 million dollars, a Falcon 9 launch is listed at about 70… more…
Rockets and launches
How much a rocket cost?
Building a rocket costs anywhere from a few million dollars for a small launcher to more than a billion for a government heavy lifter. Published prices give… more…
Rockets and launches
Why did a rocket launch today?
Rockets launch almost daily: in 2025 there were roughly 300 orbital launch attempts worldwide, more than half of them by SpaceX, so a launch on any given day… more…
Rockets and launches
What are falcon 9 rockets?
Falcon 9 is SpaceX's two-stage orbital launch vehicle: about 70 m tall, roughly 549 t at lift-off, powered by nine Merlin engines on a first stage that lands… more…
Rockets and launches
Why does starship explode when it hits the water?
Starship explodes on splashdown because the test flights are designed to end at sea, where the vehicle is not recovered. When it touches the water it tips… more…