50 free Sputnik 1 trivia questions with answers — history quiz, new questions added Aug 2026.
On 4 October 1957 a polished aluminium sphere the size of a beach ball began beeping its way around the Earth every 96 minutes, and the world changed. Sputnik 1 was thrown together in months because the Soviets feared America would get there first, it ran on batteries that lasted just three weeks, and it burned up after 1,440 orbits. Yet it triggered the Sputnik crisis, the creation of NASA and DARPA, a rush of science funding in American schools, and even the idea behind GPS. This quiz covers the whole story: Sergei Korolev's design bureau, the R-7 rocket and its failed test flights, the satellite's design and radio frequencies, the reaction in Washington and around the world, Sputnik 2 and the dog Laika, and where the surviving backups sit today. It is written for space fans, Cold War history readers and anyone brushing up on the dawn of the Space Age; early questions are approachable, later ones ask for engineers' names and exact figures. Every answer was checked against Wikipedia's articles on Sputnik 1, Sputnik 2 and the Sputnik crisis, and each question carries the sentence that supports it. Our Space Race quiz picks up where this one ends.
30 of 50 questions with answers and explanations. Play the quiz
Q 01On what date was Sputnik 1 launched?
4 October 1957
It went up during the International Geophysical Year from the Tyuratam range, now the Baikonur Cosmodrome.
Q 02What was Sputnik 1's claim to fame?
First artificial Earth satellite
Its success caught the United States off guard and set off the Space Race.
Q 03The Russian word 'sputnik', from s- and putnik, literally means what?
Fellow-traveller
It matches the Latin root satelles, meaning guard or companion, which gave English the word satellite; its everyday meanings include spouse.
Q 04What shape was Sputnik 1?
A polished metal sphere
The spherical body was deliberately chosen so atmospheric density could be worked out from how its orbit decayed.
Q 05How many external radio antennas did Sputnik 1 carry?
Four
They came in two pairs of whip-like rods, 2.4 and 2.9 metres long, giving an almost spherical radiation pattern.
Q 06Roughly how big was Sputnik 1 in diameter?
58 cm
Two hemispheres of aluminium alloy were sealed with O-rings and 36 bolts.
Q 07How much did Sputnik 1 weigh?
83.6 kg
More than half of that, 51 kg, was the battery pack, shaped like an octagonal nut with the transmitter in the hole.
Q 08For roughly how long did Sputnik 1 transmit its radio signal before the batteries died?
Three weeks
The silver-zinc batteries were expected to last two weeks and managed 22 days, falling silent on 26 October 1957.
Q 09How long did each of Sputnik 1's orbits take?
96.2 minutes
It hit a peak speed of about 8 km/s, or 18,000 mph.
Q 10How many orbits of the Earth had Sputnik 1 completed when it burned up on 4 January 1958?
1,440
It had travelled roughly 70 million kilometres; the batteries had died after just 326 orbits.
Q 11Who was the chief Soviet rocket scientist who proposed the satellite plan in 1954 and led the programme?
Sergei Korolev
After launch he waited about 90 minutes to be sure the satellite had made one orbit before phoning Khrushchev.
Q 12Which rocket, originally designed as an ICBM, launched Sputnik 1?
R-7
It was the most powerful rocket in the world, built with excess thrust because nobody yet knew how heavy a hydrogen bomb would be.
Q 13What did the letters "PS" in the project name Object PS stand for?
Prosteishiy (elementary) satellite
Q 21What did the intended orbit's apogee turn out to be compared with the plan?
About 500 km lower
A fuel regulator failed 16 seconds after launch, the engines burned rich, and the core stage cut off a second early.
Q 22What did most people who "saw Sputnik" in the night sky actually see?
The 26-metre R-7 core stage
The tiny polished sphere was only sixth magnitude; the booster trailing behind it was first magnitude and had reflective panels fitted to make tracking easier.
Q 23Which British observatory was the only one able to track Sputnik's booster rocket by radar?
Jodrell Bank
The simple sphere replaced the heavy, instrument-laden Object D, which was running late and later flew as Sputnik 3.
Q 14The heavier, more ambitious Object D that the simple sphere replaced eventually flew under what name?
Sputnik 3
Object D was to weigh up to 1,400 kg with 300 kg of instruments, but the R-7 engines underperformed and the instruments were late.
Q 15What was the launch site, later known as the Baikonur Cosmodrome, called at the time?
The 5th Tyuratam range
The remote proving ground was chosen in 1955 but not completed until 1958.
Q 16In which present-day country was Sputnik 1 launched?
Kazakhstan
The launch site was in the Kazakh Soviet Socialist Republic, at what is now Baikonur.
Q 17On which two frequencies did Sputnik 1 transmit?
20.005 and 40.002 MHz
The 0.3-second beeps alternated between the two, and their duration encoded temperature and pressure inside the sphere.
Q 18What gas filled the sealed interior of Sputnik 1?
Dry nitrogen
A barometric switch would have altered the beep pattern if the pressure dropped, signalling a leak or meteor puncture.
Q 19How was Sputnik's internal temperature kept in check?
A fan switched on above 36 °C
A dual thermal switch turned the fan off again below 20 °C.
Q 20How many R-7 launch attempts failed before the first fully successful flight in August 1957?
Three
The May flight caught fire at liftoff, the June rocket never left the pad, and the July vehicle rolled out of control and crashed 7 km away.
The Lovell Telescope had only just been completed in 1957.
Q 24Which citizen-science project organised teams of visual observers at 150 stations to watch for Sputnik?
Operation Moonwatch
Amateur radio operators were also asked by the USSR to tape record the satellite's signal.
Q 25Which university's student radio station was the first to rebroadcast the beeps to the American public?
Columbia
The signal was picked up by ham station W2AEE and taped by students at the FM station WKCR.
Q 26Which US research agency was created in February 1958 in direct response to Sputnik?
ARPA (later DARPA)
NASA followed later the same year through the National Aeronautics and Space Act.
Q 27Which 1958 law, passed after Sputnik, offered low-interest college loans to maths and science majors?
National Defense Education Act
A poll after the launch found 26% of Americans thought Soviet science was superior; a year later that had fallen to 10%.
Q 28What was the first successful American satellite, launched on 31 January 1958?
Explorer 1
It was built by the Army Ballistic Missile Agency with the Jet Propulsion Laboratory after the televised failure of Vanguard TV-3.
Q 29Which American launch failed on live television on 6 December 1957, deepening the country's dismay?
Vanguard TV-3
The Navy's Vanguard project had been chosen as America's civilian satellite entry for the International Geophysical Year.
Q 30How had President Eisenhower been forewarned of the R-7's capabilities?
U-2 spy plane photos and intercepts
His administration's first response was low-key; he even welcomed the USSR testing the legality of satellite overflights first.