In The Name Of Allah Most Gracious Most Merciful
Assalaamu alaykum wa rahmatuallahi wa barakatuhu

The Rise of the Comet with a Tail:

"A star with a luminous tail will rise from the east before the Mahdi emerges." (Muhammad ibn `Abd al-Rasul Barzanji, Al-Isha`ah li Ashrat as-Sa`ah, p. 200)

The rise of that star will occur after the eclipse of the Sun and the Moon. (Al-Muttaqi al-Hindi, Al-Burhan fi `Alamat al-Mahdi Akhir az-Zaman, p. 32)

"When this comet first appeared, the people of Prophet Noah perished, Prophet Abraham was cast into fire, Pharaoh and his people who fought against Prophet Moses perished, and John [Yahya] passed away. When you see that comet, take refuge in God from the evil of fitna." (Al-Muttaqi al-Hindi, Al-Burhan fi `Alamat al-Mahdi Akhir az-Zaman, p. 32)

 Allah Knows Best