Some information about Angirasa in nutshell:
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Angirasa: He is the son of Maharsi angirä and is known as bRhaspati,
the priest of the demigods. It is said that DroNAcArya was
his partial
incarnation. SukrAcArya was the spiritual master of the demons, and
BRhaspati challenged him. His son is Kaca, and he delivered the fire weapon
first to BharadvAja Muni. He begot six sons (like the fire-god) by his wife
CandramAsI, one of the reputed stars. He could travel in space, and
therefore he could present himself even in the planets of Brahmaloka and
Indraloka. He advised the King of heaven, Indra, about conquering the
demons. Once he cursed Indra, who thus had to become a hog on the earth
and was unwilling to return to heaven. Such is the power of the attraction
of the illusory energy. Even a hog does not wish to part
with its earthly
possessions in exchange for a heavenly kingdom. He was the religious
preceptor of the natives of different planets.
>> From Srimad Bhagavatam 1.9.8, purport by HDG A. C. Bhaktivedanta Swami Prabhupada,
Bhaktivedanta Book Trust.
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