Solar Eclipse in Hinduism: Surya Grahan

A solar eclipse, Surya Grahan (सूर्य ग्रहण), has a special place in Hindu dharma. According to the Puranas, the celestial serpent Rahu seizes the Sun during an eclipse, momentarily darkening the world. This cosmic drama symbolises the eternal struggle between light and shadow, and the transient victory of darkness before Surya reappears in full glory.

Ancient rishis and astronomers of the Vedic tradition tracked solar eclipses with remarkable precision. The Surya Siddhanta, composed over a thousand years ago, describes the mechanism of solar eclipses in ways that closely align with modern astronomy, which shows how far Vedic astronomy had come.

Types of Solar Eclipses

• Total Solar Eclipse (Purna Surya Grahan): The Moon completely covers the Sun's disk. The sky turns dark and the Sun's corona becomes visible. Total eclipses are visible only from a narrow path on Earth's surface. The highest level of Sutak observance applies.
• Annular Solar Eclipse (Kankana-ākṛti Grahan): The Moon is at its farthest point from Earth (apogee) and appears smaller than the Sun, creating a brilliant "ring of fire" (Annulus) around the Moon's silhouette. Sutak still applies.
• Partial Solar Eclipse (Khandagras Grahan): Only a portion of the Sun is covered by the Moon. Sutak applies wherever the partial eclipse is visible.

Grahana Vedha: The Sacred Window

The Grahana Vedha (or Sutak) is the period of spiritual observance that begins before the eclipse. For a solar eclipse, Vedha begins 4 Prahara (roughly 12 hours) before first contact. During Vedha, cooked food is considered impure and one should refrain from eating. Placing Darbha (Kusha) grass in water vessels and food containers is believed to purify them.

Astronomical Precision

These timings are computed from the Besselian Elements published in NASA's Five Millennium Canon of Solar Eclipses (Espenak & Meeus, 2006). The calculations account for your location's latitude, longitude and timezone to give you accurate local contact times, the same method used in the published eclipse pages.

यस्मिन् पक्षे यत्र काले येन दृग्गणितैक्यम् ।
दृश्यते तेन पक्षेण कुर्यात्तिथ्यादिनिर्णयम् ॥

yasmin pakṣe yatra kāle yena dṛggaṇita-aikyam | dṛśyate tena pakṣeṇa kuryāt tithyādi-nirṇayam ||

"In whichever school and at whatever time the unity of observation and computation is seen: by that school alone should one determine tithi and all panchanga elements."

महाऋषि वशिष्ठ · Mahāṛṣi Vasiṣṭha

यात्रा विवाहोत्सव जातकादौ खेटैः स्फुटैरेव फलस्फुटत्वम् ।
स्यात् प्रोच्यते तेन नमश्चराणां स्फुटक्रिया दृग्गणितैक्यकृद्या ॥

yātrā vivāhotsava jātakādau kheṭaiḥ sphuṭaireva phala-sphuṭatvam | syāt procyate tena namaś carāṇāṃ sphuṭa-kriyā dṛg-gaṇita-aikya-kṛd yā ||

"In journeys, marriages, festivals and horoscopes: accurate results arise only from accurate planetary positions. Therefore the procedure that achieves unity of observation and computation (dṛg-gaṇita-aikya) is here declared."

Siddhānta Śiromaṇi · Bhāskarāchārya (1150 CE)

दृक्करणैक्य विहीनाः खेटाः स्थूला न कर्मणामर्हाः ।

dṛk-karaṇa-aikya-vihīnāḥ kheṭāḥ sthūlā na karmaṇām arhāḥ

"Planetary positions lacking the unity of observation and computation are crude and unfit for ritual actions."

Bījopanayana Bhāṣya · Siddhānta Śiromaṇi tradition