So I swear by the Lord of [all] risings and settings that indeed We are able –
- “Mashreq مَشَرِقِ” means single sunrise. “Mashreqain مَشْرِقَيْنِ” means double sunrises. In this verse “Mashareq مَشَارِقِ” means multiple sunrises (3 or more). Today we know what it is, it is multi-star system.
[He is] Lord of the two sunrises and Lord of the two suns –
So which of the favors of your Lord would you deny?
Planet with two sunsets and two sunrises
Here on Earth, we’re used to seeing only one sun rise in the morning and set in the evening. But on far-off Kepler-16b, there would be two sunsets and two sunrises, one for each star the planet orbits. And those two stars also orbit each other, which means they’d appear to change position in the sky.
Reference: Double sunsets on a distant world
Reference: Where the Sun Sets Twice
Orbiting in the Habitable Zone of Two Suns
This diagram compares our own solar system to Kepler-47, a double-star system containing two planets, one orbiting in the so-called “habitable zone.” This is the sweet spot in a planetary system where liquid water might exist on the surface of a planet. Unlike our own solar system, Kepler-47 is home to two stars. One star is similar to the sun in size, but only 84 percent as bright. The second star is diminutive, measuring only one-third the size of the sun and less than one percent as bright. As the stars are smaller than our sun, the systems habitable zone is closer in. The habitable zone of the system is ring-shaped, centered on the larger star. As the primary star orbits the center of mass of the two stars every 7.5 days, the ring of the habitable zone moves around.
Reference: Orbiting in the Habitable Zone of Two Suns
Reference: Sharing the Light of Two Suns
Discovery Alert! High School Student Finds a World With Two Suns
In 2019, when Wolf Cukier finished his junior year at Scarsdale High School in New York, he joined NASA’s Goddard Space Flight Center in Greenbelt, Maryland, as a summer intern. His job was to examine variations in star brightness captured by NASA’s Transiting Exoplanet Survey Satellite (TESS) and uploaded to the Planet Hunters TESS citizen science project.“ I was looking through the data for everything the volunteers had flagged as an eclipsing binary, a system where two stars circle around each other and from our view eclipse each other every orbit,” Cukier said. “About three days into my internship, I saw a signal from a system called TOI 1338. At first I thought it was a stellar eclipse, but the timing was wrong. It turned out to be a planet