Since Rāhu had become immortal, Lord Brahmā accepted him as one of the grahas, or planets, like the moon and the sun. Rāhu, however, being an eternal enemy of the moon and sun, attacks them periodically during the nights of the full moon and the dark moon.
Since Rahu is an eternal enemy of the moon and the sun, he always tries to attack them on the nights of the full moon and the dark moon
Expressions researched:
"Since Rahu is an eternal enemy of the moon and the sun, he always tries to attack them on the nights of the full moon and the dark moon"
Srimad-Bhagavatam
SB Canto 8
Since Rahu is an eternal enemy of the moon and the sun, he always tries to attack them on the nights of the full moon and the dark moon.
Rāhu's head, however, having been touched by the nectar, became immortal. Thus Lord Brahmā accepted Rāhu's head as one of the planets. Since Rāhu is an eternal enemy of the moon and the sun, he always tries to attack them on the nights of the full moon and the dark moon.