50 free Libra trivia questions with answers — science & nature quiz, new questions added Aug 2026.
This Libra trivia quiz covers the seventh sign of the zodiac from three directions. The astrology questions ask about the scales' dates, Venus rulership, air element and cardinal modality, Saturn's exaltation, the opposite sign Aries, and Manilius's claim that Roman judges are born under it. The astronomy questions turn to the constellation itself: the claw stars Zubenelgenubi and Zubeneschamali, the green-tinged brightest star that may once have outshone Antares, the eclipsing Delta Librae, the misfiled Gamma Scorpii, the Gliese 581 planets that were and were not there, and the Methuselah star that seemed older than the universe. The mythology and history are where Libra gets interesting: the scales of Themis and Iustitia, Egyptian heart-weighing, the blindfold that started as satire, the Babylonian Zibanu sacred to Shamash, the Greek claws of the scorpion, the Egyptian boat, the Roman invention of the constellation, and the libra that gave us 'lb' and the word pound. Difficulty runs from easy to expert and is shown on every question, so the quiz suits a Libra birthday, a pub quiz round or a stargazing night. Every answer was checked against a reference page and each question carries its citation. Try our Zodiac, Astrology and Planets quizzes next.
30 of 50 questions with answers and explanations. Play the quiz
Q 01What object does the sign Libra represent?
Weighing scales
It is the only zodiac sign represented by an object rather than an animal or person.
Q 02Libra is unique among the zodiac signs because it is the only one represented by what?
An inanimate object
Every other sign is an animal or a mythological figure, though some old pictures show a man holding the scales.
Q 03Libra is which sign in the order of the zodiac?
7th
It opens the second half of the zodiac at the autumn equinox point, 180 degrees from Aries.
Q 04Which planet rules Libra?
Venus
Venus shares the job with Taurus; Saturn is said to be exalted in Libra.
Q 05Libra belongs to which element?
Air
With Gemini and Aquarius it makes up the air triplicity, the signs of thought and communication.
Q 06What is Libra's modality?
Cardinal
Cardinal signs begin the seasons; Libra starts autumn in the northern hemisphere.
Q 07Which sign is opposite Libra on the zodiac wheel?
Aries
The two mark the equinoxes: Aries the spring one and Libra the autumn one.
Q 08Which planet is said to be exalted in Libra?
Saturn
The Sun, by contrast, is in its 'fall' there, opposite its exaltation in Aries.
Q 09On average, the Sun is in the sign Libra between which dates?
September 24 to October 22
The real constellation Libra does not host the Sun until the very end of October.
Q 10Astronomically, when does the Sun actually pass through the constellation Libra (as of 2002)?
October 31 to November 22
Precession has moved the constellation more than a month away from its astrological dates.
Q 11The scales of Libra are based on those held by which Greek personification of ancient sacred law?
Themis
She was a Titan, the second wife of Zeus, and the model for modern statues of Lady Justice.
Q 12What is the Latin name of the Roman goddess of justice, whose scales became Lady Justice's?
Iustitia
She was a late arrival, introduced by Augustus, and got her own temple under Tiberius.
Q 13Which Roman emperor introduced the goddess of justice to the Roman pantheon?
Augustus
Justice was one of the virtues on his golden shield, the clipeus virtutis.
Weighing justice on scales goes back to which ancient culture, whose god Anubis weighed hearts against a feather?
Q 21Which star is the brightest in Libra?
Beta Librae (Zubeneschamali)
Unusually, Alpha is not the brightest; Bayer's letters do not always follow brightness.
Q 22Libra's brightest star is often described as showing what unusual tint?
Green
It is a hot blue-white B-type star, and no one is quite sure why observers report a greenish cast.
Q 23According to Eratosthenes, Libra's brightest star once outshone which red star in neighbouring Scorpius?
Antares
Ptolemy later called the two equal, so either Antares brightened or the Libra star is slightly variable.
Egypt
A heavy heart meant being eaten by Ammit, a crocodile-headed monster.
Q 15Since roughly which century has Lady Justice commonly been shown wearing a blindfold?
The 16th
The blindfold started as satire, showing Justice blind to the injustice in front of her, and was later reread as impartiality.
Q 16The first known statue of a blindfolded Justice, from 1543, stands on a fountain in which city?
Bern
Hans Gieng's figure tops the Gerechtigkeitsbrunnen, the Fountain of Justice.
Q 17According to the Roman writer Manilius, which professionals are born under Libra?
Judges
He also called it the sign 'in which the seasons are balanced', because day and night are equal at the equinox.
Q 18The Moon was said to be in Libra at the founding of which city?
Rome
The Romans trusted the 'balanced sign' and read a good omen into it.
Q 19Before it became the scales, the Greeks saw Libra's stars as part of which constellation?
The claws of Scorpius
They called the area chelae, the claws, and the star names still preserve that meaning.
Q 20What does the name of Alpha Librae, Zubenelgenubi, mean in Arabic?
The southern claw
Beta Librae is the northern claw and Gamma is 'the scorpion's claw', a full set of leftovers from Scorpius.
Q 24Traditionally, which two stars represent the beam of the scales, with Gamma and Sigma as the pans?
Alpha and Beta
Together the four bright stars form a quadrangle that is the easiest way to spot the constellation.
Q 25Until 1851 Sigma Librae (Brachium) carried a designation in which other constellation?
Scorpius
Benjamin Gould finally moved 'Gamma Scorpii' into Libra, where it had always physically been.
Q 26Delta Librae is what kind of variable star?
An Algol-type eclipsing binary
Every 2 days and 8 hours a companion crosses in front and dims it by a full magnitude.
Q 27Which red dwarf in Libra generated some of the first claims of potentially habitable exoplanets?
Gliese 581
The candidates 'd' and 'g' probably do not exist, and 'c' turned out to be too hot.
Q 28How far away is the red dwarf that hosts Libra's best-known planetary system?
20.5 light-years
It sits about two degrees north of Libra's brightest star.
Q 29The disputed planet 'g' in Libra's red-dwarf system was nicknamed what by one of its discoverers?
Zarmina's World
Steven Vogt said the chances of life there were '100%'; other teams could not find the planet at all.
Q 30When it was found in 2009, planet 'e' of Libra's red-dwarf system held what record?
Least massive exoplanet around a normal star
Its minimum mass was just 1.9 Earths.