According to Mahabharata, The word Durga connotes the one who protect you from sorrow and misery, For South Indians there is something called the Rahu Kala Durga Ashtak which is normally recited 3pm and 4.30 Pm on Tuesday.
On Tuesday you can pray goddess Durga in the Morning / Evening / Night. Prayer will take less than 10 minutes of regular prayer of everyday will give you immense mental strength and life long prosperity. To the extent possible, maintain personal hygiene during prayers.
Among the Navagrahas, Rahu is extremely devoted to mother Durga, Rahu is also the most powerful Navagraha. his devotion to mother makes Rahu maintain a pleasant demeanor all throughout. This is the reason our Siddhas advised us to worship mother Durga during Rahu kaal. When you do that, Your pleasing both Mother Durga and Rahu.In South India there is a practice of lighting a lamp in a lemon. Squeeze a lemon of its juice and invert the lemon. Fill it with ghee and insert a wick and then light the lamp. If you do it during Rahu kaal, Over a period of time, you will device immense benefit, Lemon has tremendous significance.
Durga also identified Adi parasakthi, Devi, Shakthi, Bhavani, Amba, Parvati, Yogmaya and by numerous other names, is a principal and popular form of Hindu Goddess, She is the warrior goddess, Whose mythology centres around combating evils and demonic forces that threaten peace, prosperity and Dharma of the good. She is the fierce form of the protective mother goddess, willing to unleash your anger against wrong. violence for liberation and destruction to empower creation.
Durga is depicted in the Hindu pantheon as a goddess riding a lion or tiger, with many arms each carrying a weapon, Often defeating Mahishasura. She appears in the Indian texts as the wife of God Shiva as another form of Parvathi or mother goddess.
She is a central deity in Shaktism tradition of Hinduism, where is equated with the concept of ultimate reality called Brahman. One of the most important texts of Shaktism of Devi Mahatmya, also called as Durga Saptashati, which celebrates Durga as Goddess, declaring her as the Supreme being and the creator of the universe.