Please also explain the regulations for offering respects to the forefathers, the creation of the Pitṛloka, the time schedule in the planets, stars and luminaries, and their respective situations.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
श्राद्धस्य च विधिं ब्रह्मन् पितॄणां सर्गमेव च । ग्रहनक्षत्रताराणां कालावयवसंस्थितिम्
śrāddhasya ca vidhiṃ brahman pitṝṇāṃ sargameva ca | grahanakṣatratārāṇāṃ kālāvayavasaṃsthitim
SB 3.7.33