At-Takwir Verse 16

which travel and hide,[[ This probably refers to black holes. Kanasa means to sweep or hide. Miknasah is derived from this, and is the standard word for a vacuum cleaner. ]]

that rise and hide,

the runners, the sinkers,

that recede, move, and hide,

Moving swiftly and hiding themselves,

Go straight, or hide;

that hide,

The planets withdrawing into themselves,

Who move straight and stop.

the comets,

And rise in their course, and then set (disappearing again);

Those (planets) that continue their forward course (along their orbits) and then disappear.

The flowing/orbiting , the orbiting/sweeping planets/stars.

Who move straight and stop.

That run their course and hide themselves,

And by the planets that move swiftly and hide themselves,

And the night when it departs.

That run their course (and) hide themselves,

The stars which rise and set,

stars which are visible during the night

orbiting, disappearing;

Al-Jawar Al-Kunnas.

the planets that run their course and set,

Precisely running their courses.

the movers, the setters, that is, the five planets; Saturn, Jupiter, Mars, Venus and Mercury (takhnusu means `they sink away' during their orbit, whereas we see stars at the end of their zodiacal course return to the start; taknisu means that they enter their kins, `hideaway', in other words, they retreat into their setting- places);

وَاللَّيْلِ إِذَا عَسْعَسَ


وَالصُّبْحِ إِذَا تَنَفَّسَ

But nay! I swear by Al-Khunnas,
Al-Jawar Al-Kunnas,

and by the night when it `As`as,

and by the day when it Tanaffas."

Ibn Jarir recorded from Khalid bin Ar`arah that he heard Ali being asked about the Ayah;
الْجَوَارِ الْكُنَّسِ
,
فَلَ أُقْسِمُ بِالْخُنَّسِ
(Nay! I swear by Al-Khunnas, Al-Jawar Al-Kunnas.) and he said,

"These are the stars that withdraw (disappear) during the day and sweep across the sky (appear) at night."

Concerning Allah's statement,

وَاللَّيْلِ إِذَا عَسْعَسَ