Which demon swallowed sun in Mahabharata?

In the Mahabharata, the demon who swallowed the sun is known as Rahu. During the cosmic event of the churning of the ocean (Samudra Manthan), Rahu disguised himself as a deity to consume the nectar of immortality. However, he was discovered by the gods and, as a punishment, his head was severed, leading to his eternal enmity with the sun and moon, resulting in solar and lunar eclipses when he attempts to devour them.