Sun red giant: Resurrection Day
Resurrection Day.
The day our Sun becomes a Red Giant
According to Islamic belief, during Al-Husher (The Gathering), a stage that comes after resurrection and before the judgment, the Sun will be brought near to the Earth1.  Astronomers are predicting that when our Sun fuses the last of its hydrogen into helium and grows into a Red Giant, in about 4-5 billion years, it will swallow Mercury, Venus and the Moon and get very close to the Earth.  There is disagreement about whether the Earth will be engulfed or not. The outer planets will escape to a wider orbit and could eventually drift into space.  As the Sun increases in size its luminosity increases and its surface temperature decreases.  The extreme heat of the expanding approaching luminous Sun will evaporate the Earth’s oceans  and destroy its atmosphere, eventually turning Earth into a hellish planet of molten rock.  The Glorious Quran reveals the events of that period and describes them in great detail. 
1- Sunan Al-Tirmithi