§ 02 — Stellar Science
Meet the Stars of Orion
Orion is a stellar showroom — it hosts some of the most extreme stars known to astronomy. The table below lists all 8 principal stars with their Western names, Indian/Sanskrit identities, stellar type, distance, and their role in the hunter's figure.
| Western Name |
Bayer |
Indian / Sanskrit Name |
Stellar Type |
Distance (ly) |
App. Mag. |
Role in Orion |
| Betelgeuse |
α Ori |
আর্দ্রা Ardra (Ārdrā)
आर्द्रा · Nakshatra 6
Ruling deity: Rudra
|
M-type Red Supergiant (semiregular variable) |
548 |
0.50 (variable) |
Right shoulder |
| Rigel |
β Ori |
বাণরাজা Mrigavyadha
मृगव्याध
"Deer hunter" — Orion's foot-star
|
B-type Blue Supergiant |
863 |
0.13 |
Left foot |
| Bellatrix |
γ Ori |
কার্তিকেয় Bahu / Yavana
बाहु
"The arm / shoulder" in Vedic texts
|
B-type Blue Giant |
250 |
1.64 |
Left shoulder |
| Mintaka |
δ Ori |
চিত্রলেখ Mrigashiras (Mṛgaśiras)
मृगशिरस् · Nakshatra 5
Ruling deity: Soma (Moon)
|
O+B-type Eclipsing Binary |
1,200 |
2.23 |
Belt — westernmost |
| Alnilam |
ε Ori |
অনিরুদ্ধ Mrigashiras (Mṛgaśiras)
मृगशिरस् · Nakshatra 5
Central & brightest Belt star
|
B-type Blue Supergiant (mass-losing) |
1,344 |
1.69 |
Belt — middle |
| Alnitak |
ζ Ori |
ঊষা Mrigashiras (Mṛgaśiras)
मृगशिरस् · Nakshatra 5
Eastern Belt star
|
O-type Blue Supergiant (triple star) |
1,260 |
1.77 |
Belt — easternmost |
| Saiph |
κ Ori |
কার্তবীর্য Pada (Pāda)
पाद
"The foot" — right foot of Kalpurush
|
B-type Supergiant |
650 |
2.09 |
Right foot |
| Meissa |
λ Ori |
মৃগশীর্ষ Shiras (Śiraḥ)
शिरः
"The head" — crown of Kalpurush
|
O8 III Blue Giant (multiple star) |
1,320 |
3.33 |
Head |
★ Indian names: Nakshatra identifications follow the classical Vedāṅga Jyotiṣa and Sūrya Siddhānta tradition.
The three Belt stars (Mintaka, Alnilam, Alnitak) together constitute the nakshatra Mṛgaśiras.
Betelgeuse alone constitutes Ārdrā. These are among the 27 lunar mansions of Hindu astronomy.
🔴 Betelgeuse (Ārdrā) — A Star on the Edge
Betelgeuse (α Orionis / Ārdrā nakshatra) is one of the largest stars visible to the naked eye. If placed at the Sun's position, it would engulf Mercury, Venus, Earth, and Mars, extending nearly to Jupiter's orbit. It is a semiregular variable star — its brightness oscillates as the star pulsates.
Most dramatically: Betelgeuse is expected to explode as a core-collapse supernova within the next 100,000 years — possibly much sooner. When it does, it will briefly outshine the full Moon and be visible in daylight. In 2019–2020, it dimmed dramatically (the "Great Dimming"), later attributed to a massive surface ejection forming a dust cloud.
"Betelgeuse — Ārdrā, the nakshatra of Rudra — is fusing progressively heavier elements in its core. The end result will be a core-collapse supernova. For a few weeks, Earth's sky will have two Moons. This is most likely within the next 100,000 years."
— Based on stellar evolution models; source: Wikipedia / Orion (constellation); supernova timeline from NCERT-level astrophysics context.
💙 Rigel — The Blue Supergiant Left Foot
Rigel (β Orionis) is technically the brightest star in Orion despite its Beta designation — a historical naming accident. A B-type blue supergiant 863 light-years away, Rigel is roughly 120,000 times more luminous than our Sun. Like Betelgeuse, Rigel is also fusing heavy elements and will likely end as a supernova on astronomical timescales.
🔵 The Belt (Mṛgaśiras) — Three Kings of the Sky
Orion's Belt — Mintaka, Alnilam, and Alnitak (collectively the Mṛgaśiras nakshatra) — is the most recognisable asterism in the night sky. Nearly perfectly aligned east-to-west, all three are hot blue supergiants between 1,200–1,344 light-years from Earth. The Belt rises almost due East and sets almost due West, making it a perfect navigational tool — used by sailors from the Arabian Sea to the Pacific for millennia.
Alnilam, the middle star, is 375,000 times more luminous than the Sun. Alnitak is a triple star system and the brightest O-type star visible to the naked eye. Mintaka is an eclipsing binary — its two components orbit each other every 5.73 days, causing a periodic dip in brightness.