50 Fun Facts About Rockets

Which creatures became the first animals in space, riding a captured German rocket from New Mexico in 1947?

Fruit flies rode 109 km up so scientists could study radiation at high altitude, and were recovered alive. Monkeys followed two years later, and the first dog reached orbit in 1957.

Which rocket-launch ritual first appeared in Fritz Lang's 1929 silent film 'Woman in the Moon'?

The countdown appeared as title cards ticking from six down to 'now'. Rocket pioneer Hermann Oberth advised on the film, whose spaceship is also rolled out to its pad on rails.

NASA floods its launch pads with water at liftoff mainly to protect a rocket from what?

Its own noise is the danger: exhaust shockwaves approach 200 decibels. After the first Shuttle launch lost 16 heat tiles, NASA upgraded pads fed by a 300,000-gallon water tower.

Which newspaper printed a correction in July 1969, 49 years late, admitting that rockets can work in a vacuum?

The New York Times had sneered in 1920 that a rocket pioneer lacked 'the knowledge ladled out daily in high schools'. Its correction ran the day after Apollo 11 lifted off for the Moon.

Which American anti-tank rocket launcher of World War II was nicknamed after a comedian's musical instrument?

Bazooka was the name of a horn invented by 1930s comedian Bob Burns, and the weapon's plain tube looked vaguely like it. Soldiers also called the launcher the 'stovepipe'.

What colour was the Space Shuttle's huge fuel tank on its first two flights, before NASA left it bare?

Painting it white added about 600 pounds and did not protect the foam underneath, so NASA stopped. The orange is the bare colour of the tank's spray-on insulation.

The rockets described in the US national anthem were British weapons bombarding which Baltimore stronghold?

Fort McHenry barely suffered from the rockets, which were built to start fires and found little to burn. Francis Scott Key witnessed the 1814 bombardment and wrote the poem that became the anthem.

Which three-stage NASA rocket, taller than the Statue of Liberty, launched every Apollo crew that flew to the Moon?

Saturn V stood 363 feet tall with an Apollo spacecraft on top. Its final launch carried no crew at all: it lifted Skylab, America's first space station, built from a converted third stage.

Which rocket made history in December 2015 as the first orbital-class booster to fly back and land upright?

Falcon 9 managed it on its 20th flight, touching down on land minutes after liftoff. SpaceX has routinely reflown its first stages since 2018.

In which country did gunpowder 'fire arrow' rockets first appear, later spreading west with the Mongol invasions?

China had gunpowder rockets by the 13th century, under the Song dynasty. The old name stuck: in Chinese, 'fire arrow' became the everyday word for a rocket.

Which law of physics explains how a rocket moves forward by blasting hot gas out behind it?

Newton's third law says every action has an equal and opposite reaction, so gas hurled backward shoves the rocket forward. Nothing behind the engine is needed to push against.

Which American physicist launched the world's first liquid-fuelled rocket from his aunt's Massachusetts farm in 1926?

Robert Goddard's rocket, later nicknamed Nell, climbed just 41 feet in a 2.5-second flight and came down in a cabbage field. A NASA space flight center in Maryland was named for him in 1959.

Which German-born engineer, brought to America under Operation Paperclip, was chief architect of NASA's Moon rocket?

Wernher von Braun had built Germany's wartime missiles before he and about 1,600 other specialists were secretly moved to the United States. In 1960 he became the first director of NASA's Marshall center.

Which sports car did SpaceX launch into orbit around the Sun in 2018 with a spacesuited mannequin at the wheel?

Tesla Roadster was Elon Musk's own car, chosen because a risky test flight should carry the 'silliest thing we can imagine'. The mannequin in the driver's seat is known as Starman.

A stiffened rubber O-ring in a booster joint doomed which Space Shuttle 73 seconds after liftoff in January 1986?

Challenger launched on a record-cold morning that left the seals too stiff to close the joint. Physicist Richard Feynman later showed the flaw on television with a clamp and a glass of ice water.

Rockets can fire in airless space because they carry which ingredient that a jet engine takes from the air?

An oxidizer such as liquid oxygen lets the fuel burn with no air around. Rocket engines actually work more efficiently outside the atmosphere than inside it.

What kind of animal was Ham, who rode a Mercury-Redstone rocket three months before the first American astronaut?

A chimpanzee trained to push a lever when a light flashed, Ham reacted in space almost as fast as on Earth. His name is an acronym of the Holloman Aerospace Medical Center.

Why do most space rockets drop their lower stages partway through the climb to orbit?

To shed dead weight: an empty tank and its engines are useless mass the remaining fuel would have to lift. No single-stage rocket has yet reached orbit from Earth.

Which rocket's giant booster was caught in mid-air by its launch tower's 'chopstick' arms in 2024?

Starship's Super Heavy booster slowed to a near hover and slid sideways into the arms of a tower nicknamed Mechazilla. It happened on only the fifth full test flight.

Rockets usually launch eastward, from sites near the equator where possible, to gain free speed from what?

Earth's rotation carries the ground eastward at about 1,670 km/h at the equator, a head start that shrinks toward the poles. Launching westward would mean fighting it instead.

Which German wartime missile, launched against London in 1944, was also the first human-made object to reach space?

V-2 was one of Germany's 'vengeance weapons', and more than 3,000 were fired at Allied cities. A test shot on 20 June 1944 climbed past 100 km, the height later chosen to mark where space begins.

Which Soviet 'Chief Designer', whose name stayed a state secret until his death in 1966, led the Sputnik programme?

Sergei Korolev spent nearly six years in Stalin's prisons and labour camps, including months at Kolyma, before he ran the space programme. Hiding his name was partly a shield against assassination.

Which Russian rocket family, flying since the 1960s, holds the record for the most launches in spaceflight history?

Soyuz rockets have flown more than 1,700 times since the first one was introduced in 1966. Their engines are still lit by pyrotechnic flares mounted on birch poles.

From which spaceport in Kazakhstan did both Sputnik 1 and Yuri Gagarin's Vostok 1 lift off?

Baikonur is still run by Russia, which leases the site from Kazakhstan under a deal lasting until 2050. The pad used for both flights was renamed Gagarin's Start.

Which boundary 100 km above sea level, named after an aerospace engineer, is widely used as the edge of space?

Kármán line honours Theodore von Kármán, who worked out roughly where air becomes too thin for wings to carry a plane. International law still sets no official edge of space.

What is the speed, about 11 km per second at Earth's surface, beyond which gravity cannot pull an object back?

Escape velocity is about 40,000 km/h at Earth's surface. Rockets rarely try to reach it in one burst: they usually enter a parking orbit first, where the figure is slightly lower.

Which super-cold fuel, stored at about minus 253 °C, fed the three main engines of the Space Shuttle?

Liquid hydrogen is so light that its tank was the largest part of the Shuttle's fuel stack yet weighed relatively little. Burned with liquid oxygen, it leaves an exhaust that is mostly water.

Which company named its rockets New Shepard and New Glenn after pioneering American astronauts?

Blue Origin was founded by Jeff Bezos in 2000, two years before SpaceX existed. In 2021 he rode his own suborbital rocket to space on its first crewed flight.

Which Alabama city, home to NASA's Marshall Space Flight Center, is nicknamed 'The Rocket City'?

Huntsville earned the name after the US Army moved its German rocket engineers there in 1950. The area's minor-league baseball team is called the Rocket City Trash Pandas.

Which self-taught Russian schoolteacher published the basic equation of rocket flight in 1903?

Tsiolkovsky lost his hearing to scarlet fever at nine and taught himself because schools would not admit him. His 1903 paper proposed using rockets to travel through space.

Which fuel does SpaceX's Raptor engine burn, chosen partly because it could one day be made on Mars?

Methane could be synthesised on Mars from underground water and the carbon dioxide in the air, using the Sabatier reaction. Paired with liquid oxygen, the mix is nicknamed methalox.

Which noble gas is the usual propellant in the ion thrusters of deep-space probes such as NASA's Dawn?

Xenon atoms are stripped of electrons and hurled out at very high speed. The push is tiny: on the Deep Space 1 probe it roughly equalled the weight of a single sheet of paper.

On a launch broadcast, the callout 'max q' marks the moment a climbing rocket faces its greatest what?

Aerodynamic pressure peaks at max q, short for maximum dynamic pressure, about a minute after liftoff for the Space Shuttle. Engines are often throttled down just before it to ease the strain.

What is the name for steering a rocket by swivelling the engine nozzles from side to side?

Gimballing tilts the line of thrust away from the rocket's centre of gravity, which turns the whole vehicle. Some wartime rockets steered with vanes set in the exhaust instead.

What is the name of the nose-cone shell that shields a satellite during launch and is cast off once in space?

The fairing guards its cargo against air pressure and frictional heat on the way up. Many split into two halves like a clamshell, and SpaceX recovers its halves from the sea to fly again.

Which kind of rocket motor, used in the Space Shuttle's twin side boosters, cannot be shut off once it is lit?

Solid-fuel motors hold everything needed to burn in one casing, so nothing can be turned off. The Shuttle's pair gave 85% of its liftoff thrust, then parachuted into the Atlantic to be reused.

The Soviet R-7 rocket that put Sputnik into orbit in 1957 had originally been designed to carry what?

A nuclear warhead was its intended cargo: the R-7 was the first intercontinental ballistic missile. It made a poor weapon, though, needing about 20 hours of preparation before it could fly.

What term describes propellants, like those in the Apollo lunar module, that ignite the moment they touch each other?

Hypergolic engines need no ignition system, so they can be fired again and again simply by opening valves. The price is propellant that is highly toxic and corrosive.

Which ruler of Mysore used iron-cased war rockets against British troops in the 1790s?

Tipu Sultan employed up to 5,000 rocket artillerymen. After his defeat in 1799 several of the weapons were sent to Britain, where William Congreve began developing his own rockets in 1804.

Which giant Soviet Moon rocket failed on all four of its launch attempts between 1969 and 1972?

N1's second test flight ended in one of the largest conventional explosions ever, wrecking its launch pad for 18 months. Development had begun almost four years behind America's Moon rocket.

Which rocket launched the James Webb Space Telescope from South America on Christmas Day 2021?

Ariane 5 could carry the telescope only because its sunshield was folded twelve times to fit inside a nose cone 4.57 metres wide. The rocket flew its final mission in 2023.

Which NASA rocket, powered by engines salvaged from retired Shuttle orbiters, first flew on Artemis I in 2022?

Space Launch System's core stage burns four RS-25 engines that once flew on Shuttle orbiters. Its side boosters reuse old Shuttle casing segments too, with an extra one added for more power.

Which NASA facility near Pasadena grew out of 1930s rocket tests by a Caltech group nicknamed the 'Suicide Squad'?

Jet Propulsion Laboratory traces its start to 1936 rocket firings in a dry canyon called the Arroyo Seco. In 1958 it helped launch Explorer 1, the first American satellite.

Which film starring Jake Gyllenhaal tells the true story of Homer Hickam, a coal miner's son who built rockets?

October Sky is an anagram of Rocket Boys, the title of the memoir it is based on. Hickam grew up in Coalwood, West Virginia, and went on to become a NASA engineer.

Which American rocket exploded on its pad in December 1957, earning newspaper nicknames like 'Flopnik' and 'Kaputnik'?

Vanguard lost thrust two seconds after liftoff and fell back in flames, though its little satellite was thrown clear with its beacon still transmitting. A rival Army team reached orbit eight weeks later.

Which rocket-powered plane, nicknamed 'Glamorous Glennis', did Chuck Yeager fly through the sound barrier in 1947?

The Bell X-1 was carried into the air under a B-29 bomber before lighting its rocket engine. Yeager named it for his wife and flew that day with two ribs broken in a riding fall.

Which privately built rocket plane won the $10 million Ansari X Prize in 2004 by reaching space twice in two weeks?

SpaceShipOne rode to altitude under a mother ship called White Knight, then lit a hybrid motor that burned rubber with nitrous oxide. It was retired as soon as the prize was won.

Which measure of rocket engine efficiency, quoted in seconds, plays the role that fuel economy does for a car?

Specific impulse comes out as the same number of seconds in metric and imperial units, which makes it handy for comparing engines. Ion thrusters score very high despite their feeble push.

Which country launches its PSLV rockets from Sriharikota, an island spaceport in the Bay of Bengal?

India used a PSLV to send its first probe to Mars in 2013 and its first to the Moon. In 2017 a single one of the rockets released 104 satellites, nearly tripling the record at the time.

Which California base launches rockets southward over the Pacific to put satellites into polar orbits?

Vandenberg rockets can head toward the South Pole without crossing any land until Antarctica. The base was first used to test long-range missiles fired west over the ocean.