Explanation of the author's statement: "…and following it is the time of Maghrib until the disappearance of the redness…"

The Shaykh : He said "and following it is the time of Maghrib until the disappearance of the redness", meaning the time of Maghrib follows the time of 'Asr without an interval and without any overlap in time between them. The time of Maghrib is from the setting of the sun to the disappearance of the redness. As soon as the disk of the sun disappears from the horizon, the time for the Maghrib prayer begins. "Until the disappearance of the redness" means the redness in the sky; when the redness disappears—not the whiteness—the time of Maghrib ends and the time of 'Isha' begins.
Now, what is its duration in hours? Its duration in hours varies according to the seasons; sometimes it is longer and sometimes shorter. However, it is known by observation: when you see that the redness has disappeared from the horizon, that is proof that the time of Maghrib has ended. It ranges between one and a quarter hours after sunset and one and a half hours and three minutes approximately after sunset, meaning it varies with the seasons. Now.