It begins with the Quran itself, where the stunning star Sirius is not only referred to, but by name. This was not scripture, it was inspiration.
Since the Quran had defined heavenly bodies as moving in flawless circles, curious minds during the Islamic Golden Age asked: “How precisely do they move? And can it be predicted?”
It opened a golden period of astronomy. Without telescopes, Muslim astronomers built enormous observatories and built instruments of precision that mapped the heavens with astronomically precise accuracy.
The reason why this is such a great story is the manner in which science and religion coexisted. The very people who were computing the orbits of the planets were often computing them in order to compute times for prayer or the location of Mecca. Their religion was not invading science but driving it forward.
And here we are arriving and crossing the stars with an Islamic worldview, and observing how easily one reference in the holy book to Sirius created scientific breakthroughs which continue to govern our lives today.
It is one of invention, discovery, and looking upwards in a sense of purpose and curiosity.
Islamic Golden Age Breakthroughs: Astronomy
The Islamic Golden Age (circa 8th-14th century) saw astounding astronomical developments that have left an indelible mark on our modern understanding of the cosmos. A few of the most valuable astronomical achievements of those times are enumerated below:
Important Astronomical Achievements
- Observatories: Constructing sophisticated observatories like Maragheh Observatory (13th century) and Samarkand Observatory (15th century) facilitated unparalleled precision in the observation of the sky.
- Star Catalogs: Astronomers such as al-Sufi produced sophisticated star catalogs, his “Book of Fixed Stars” (964 CE) a refinement of Ptolemy’s previous work, and with new observations.
- Astronomical Instruments:
- Invention and use of the astrolabe for navigation and time-keeping
- Development of quadrants, armillary spheres, and celestial globes
- Improvements by Al-Biruni of sophisticated observation techniques
- Planetary Models: The Maragheh school developed non-Ptolemaic planetary models that refined defects in previous Greek work.
Greatest Astronomers
Al-Battani (858-929 CE): Calculated the solar year as 365 days, 5 hours, 46 minutes, and 24 seconds (only 2 minutes and 22 seconds out today).
Ibn al-Haytham (965-1040 CE): Made valuable contributions to the field of optics and developed an early scientific theory of approach.
Nasir al-Din al-Tusi (1201-1274 CE): Developed the Tusi couple, a mathematical device for the explanation of planetary motion.
Ibn al-Shatir (1304-1375 CE): Formulated models that disposed of the equant and informed Copernicus’s later work.
Legacy
Astronomical innovations rescued and expanded Greek gains and constructing new mathematical models which would still shape European astronomers like Copernicus.
Islamic astronomical tables and instruments were the unchallenged standard for centuries, and that is proof of the awe-inspiring scientific advancements of this period.
Who Discovered the Telescope in Islam?
It must be pointed out that the modern telescope (with glass lenses or a mirror) was not discovered during the Islamic Golden Age.
The telescope was originally constructed in early 17th century Europe, commonly attributed to be Hans Lippershey of the Netherlands, who received the first patent in 1608, subsequently Galileo Galilei who made further improvements.
Islamic Optical Contributions
Although Islamic scholars themselves did not invent the telescope, they laid out optics in complex detail that opened the way for later telescopic innovation:
- Ibn al-Haytham (Alhazen, 965-1040 CE): Nearly everyone today knows him as the father of modern optics; his “Book of Optics” (Kitab al-Manazir) transformed our understanding of vision, light, and optics.
He:
- Correctly described seeing (apart from the Greek emission theory)
- Detailed description and refraction
- Spent considerable research on lenses and mirrors
- Conducted early experiments with a camera obscura
- Al-Kindi (801-873 CE): Authored early treatises on optics, e.g., “De Aspectibus,” on the physics of light
- Kamal al-Din al-Farisi (1267-1319 CE): Developed Ibn al-Haytham’s work and explained the phenomenon of the rainbow
Tools for Observations
Advanced non-telescopic instruments of observation were developed by Islamic astronomers:
Astrolabes: Breakthroughs in celestial measurements
Quadrants: Fine instruments for precise measurement
Observatories: Built giant observation buildings, allowing naked-eye astronomy to be as precise as possible
These optics principles and observation methods provided a scientific foundation that would later be used to extend telescope astronomy, while the telescope itself as a device took centuries after the Islamic Golden Age to build.
What Does the Quran Say About Astronomy?
The Quran is full of references to cosmic events and celestial objects. Not a science textbook, it does contain, however, verses that Muslims throughout history have connected with celestial events. Some of the more fascinating examples follow:
- Cosmic Allusions in the Quran
- Cosmic Order and Movement
The Calculated Courses of the Sun and Moon:
“The sun and moon [move] by precise calculation.” (Quran 55:5)
Orbits:
“And it is He Who hath created the night and the day and the sun and the moon; all [heavenly bodies] in an orbit are swimming.” (Quran 21:33)
Stars and Constellations
Stars as Guides for Navigation:
“And He is the One Who hath made the stars as guides for you in the darkness of the land and sea.” (Quran 6:97)
Constellations in the Firmament:
“Blessed is He who hath set in the sky constellations and placed between them a lamp and a shining moon.” (Quran 25:61)
Cosmic Origins
Expansion of the Universe:
“And the heaven which We have constructed with strength, and lo. We are [its] expander.” (Quran 51:47)
Celestial and Earth Formation:
“Have not those who disbelieved considered that the heavens and the earth were a unified body, then We parted them.” (Quran 21:30)
Historical Context
Islamic scholars in the Islamic Golden Age were inspired by such Quranic references to learn astronomy.
These scientists viewed scientific research as a way of gaining knowledge about God’s work. Practical requirements (prayer time, direction towards the Kaaba in Mecca, lunar calendar) gave a religious basis and resulted in astronomical advancements.
Interpretations
We can see that interpretations of such verses have been varied:
- These verses would be interpreted by the traditional scholars in their existing cosmology
- These verses have been equated to recent astronomical measurements in modern-day interpretations
- There are diverse opinions concerning the interpretation of these allusions to the stars as being literal or figurative
The association of Quranic verse with the observation of the stars is only one of how religious texts fostered scientific inquiry during the Islamic Golden Age, when scholars were interested in both divine revelation and the world around them.
Which Star is Mentioned in the Quran?
There is only one star mentioned in the Quran:
Sirius (Al-Shi’ra)
The star Sirius is mentioned in Surah An-Najm (The Star), chapter 53, verse 49:
“And that it is He who is the Lord of Sirius (الشِّعْرَى, al-shi’ra)”
Quran 53:49
What does Sirius mean?
Brightest Star: Sirius is the brightest naked-eye star in the sky, visible from almost any place on our planet
Historical Significance: In ancient Arabian times, Sirius was considered a god by some
Theological Message: The verse emphasizes that Allah is the creator and owner of this significant celestial body, not a god itself
Other Celestial References
While Sirius is the only named star, the Quran refers to stars in numbers in numerous verses:
- An-Najm (The Star): A complete chapter (53) is named after the title of stars
- Al-Buruj (The Constellations): Chapter 85 has been named after celestial constellations
- Al-Tariq (The Night Visitor): Chapter 86 begins with an oath upon “the sky and the night comer” (interpreted by the majority of commentators as a star, i.e., Sirius)
Cultural Significance
Mention of Sirius in the Quran carried cultural significance:
- It interfered with star-worshipping cults in pre-Islamic Arabia
- It caused Muslims to study and look at the stars from which to navigate and keep time
- It maintained astronomy at the forefront throughout the Islamic Golden Age
This specific allusion to Sirius shows how the Quran took common aspects of astronomy from within its tradition and reinterpreted them in terms of monotheistic theology.
Conclusion
The Islamic Golden Age contribution to science in astronomy is an example of how religion, curiosity, and mind can be married together to discover the mysteries of the universe.
Aided by references to astronomy in the Quran, most particularly the reference to Sirius, Muslim scientists gazed up into heaven not just to be obedient to divine command but to study the universe with scientific scrutiny and brilliance.
With the building of giant observatories and astronomic equipment to optics and defining European astronomy to be, their legacy is huge and enduring.
They taught us that seeking knowledge is a divine action, an act which brings us closer to the world and God.
We take steps today, gazing upward at the stars in supplication, wonder, or query, in the footprints of other individuals who looked upward before us throughout the Holy Month and in the days since, for a purpose, wisely, and as an expression of gratitude for existence.
