Hathor was the goddess of joy, motherhood, and love. She looked after all women.
She was the goddess of music and dancing, as well. Dead women were identified with Hathor, as men were identified with Osiris. She has a sun disk on her head and cow horns. Sometimes she had cow's ears or was a whole cow.
But she had another side as well, as Sekhmet, the Eye of Ra, the destructive Sun Goddess. The Egyptians knew that the Sun brought life, but they also knew that the desert Sun could kill you.
Ra, the Sun God, was angry with mankind, because they laughed at him. He said that he'd send down his anger as Sekhmet, the Eye of Ra. She went down to Earth, killing men, and drinking their blood. She started to frighten Ra, who only wanted to punish Mankind, not destroy them all. So he dyed some beer red, to look like blood. When Sekhmet saw the beer, she was thristy for blood, so she drank it all, got drunk and went to sleep. When she woke up, Ra persuaded her to stop killing Mankind.