#sadr

[quiltofstars]

The constellation of Cygnus, the Swan // Ondra Vyhlídal

Click below for an annotated image and some facts about Cygnus and some of its named stars!

Cygnus is one of the most recognizable constellations in the northern hemisphere and one of the original 48 constellation set down by Ptolemy. In Greek mythology, Cygnus is generally seen as the swan that Zeus disguised himself as to seduce Leda, Spartan king Tyndareus's wife, who gave birth to the Gemini twins as well as Helen of Troy and Clytemnestra.

In order of brightness, the named stars are:

Deneb (α Cygni), a blue supergiant star about 2,000 light years away. It is the brightest star in Cygnus, and is one of the furthest bright stars in the sky. In about 6,700 years, it will also become the north pole star! Its name comes from the Arabic phrase Dhanab al-Dajājah meaning "tail of the hen."

Sadr (γ Cygni) is a yellow-white supergiant star about 1,800 light years away. It is the brightest of a quadruple system of stars. Its name comes from the Arabic word ṣadr meaning "chest."

Aljanah (ε Cygni) is an orange giant star, part of a binary system about 73 light years away. Its name comes from the Arabic word al janāħ meaning "the wing."

Fawaris (δ Cygni) is a blue giant star about 165 light years away. Its name comes from the Arabic word al-Fawāris meaning "the riders."

Albireo (β Cygni) is a star system consisting of an orange giant and several blue-white giant stars lying about 370 light years away. The origin of its name is unclear, but may be a transcription error in Latin.

Azelfafage (π¹ Cygni) is a blue giant star about 1,700 light years away. Its name comes from the Arabic word al-sulaḥfāh meaning "the tortoise."

[nightowldelta]

The constellation of Cygnus, also known as the Swan. Here you can see four prominent stars of that constellation/

Deneb

Sadr

Fawaris

Aljanah

[johnlyngfr]

The Sadr Region of the Milky Way

The bright star at the centre of the constellation of Cygnus (the Swan) is Sadr. In late summer, it has our attention because it is overhead in the evening if you live in the northern hemisphere. In cities with light pollution, it helps locate an adjacent spiral arm in our Milky Way galaxy. Point a telescope there, and it reveals a beautiful tapestry of stars and interstellar dust. The telltale red colour suggests hot hydrogen in a star-forming region.

The bright star at the centre of this photo is Sadr, at a distance of only 1,800 light years, it is certainly nearby, as is the adjacent spiral arm.

I photographed the Sadr Region from my garden in Strasbourg France on a single night in August 2024. This is an ensemble of 80 photographs, where each was a 3 minute exposure (4 hours of astrophotography).

Sadr Region - Wikipedia

Sadr Region - Wikipedia

[reh-numa]

[connorgavinarmy]

Drabble Challenge Day 8: Stars

The Drabble Challenge by: @thedrabblecollective Day 8 Prompt: Stars Fandom: Detroit: Become Human Characters: Captain Allen, Sixty / RK800-60

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“Would you look at that,” Allen gaped at the stars, something rare under Detroit’s light-polluted skies.

His unit was deployed a few miles out of town, only for it to be called off. Bad intel.

Sixty smirked. “The great SWAT captain is dumbfounded by the sky?”

“Not just the sky,” he said, pointing. “Deneb, Albireo.”

Sixty’s eyes followed.

“Sadr, Aljanah, Fawaris. The Northern Cross.”

The android’s LED blinked. “How will knowing asterisms help with missions?”

“It’s not protocol,” Allen grinned, “but it helps you bond with your grumpy android rookie.”

Sixty scoffed, yet quietly logged it as a core memory.

📷 (c) Klemen Vrankar

Constellation Guide, Northern Cross

[bloodonmyveil]

"MY BONES THEY CRACKLE .....my bones they crackle."

-A.BLOOD

[scarletandgreyexotics]

Sadr, 2020 Gonyosoma oxycephalum (Java locale, silver phase)

[zespaceblog]

Sadr (γ Cygni)

Some stars are surrounded by the most spectacular backdrops, and Sadr in the constellation of Cygnus is certainly one.

The star itself was a blue giant which has now expanded into its supergiant stage, and it's colour has changed from the blue's you see in the Pleiades cluster to a yellow white, as the increased surface area of the star's temperature lowers, it moves towards the red colour.

It's estimated to only be 12 million years old, compared to the 4,600 million years age of our sun, but very typical of these fast burning massive stars.

While it's distance is 1,800 light years from Earth, the background nebula's and clusters are much further behind it, around 4,000 light years from Earth.

Above is NGC 6910 Open cluster and IC 1318 the Butterfly Nebula.