Yeah, they are that, astral. It is not mentioned that 'this' hell is located in 'this' galaxy, in 'this' star or in 'this planet'.But before being born, he has to suffer his time in hell for any ill-deed done by him. Even then the slate is not clean, because the God of Fate, Vidhata, Lord Brahma, keeps some fruits of actions which he may cause to fructify at any desired time. That introduces a factor of uncertainty.
There are these kinds of karmas in Hinduism:
"Everything that we have ever thought, spoken, done or caused is karma, as is also that which we think, speak or do this very moment.
[2] Hindu scriptures divide karma into three kinds:
1.
Sanchita is the accumulated karma. It would be impossible to experience and endure all karmas in one lifetime. From this stock of
sanchita karma, a handful is taken out to serve one lifetime and this handful of actions, which have begun to bear fruit and which will be exhausted only on their fruit being enjoyed and not otherwise, is known as
prarabdha karma.
2. Prarabdha Fruit-bearing karma is the portion of accumulated karma that has "ripened" and appears as a particular problem in the present life.
3. Kriyamana is everything that we produce in the current life. All
kriyamana karmas flow in to
sanchita karma and consequently shape our future.
https://en.wikipedia.org/wiki/Karma_in_Hinduism
Kriyamana (actions in this life) flow into
Sanchita (the brought forward), part of
Sanchita may be wiped in hell, but another parts is reserved for future lives, that is known as
Prarabhda. That comes up suddenly without warning as per the wishes of Lord Brahma. This is for good deeds as well as evil deeds. For example, one may win a lottery ticket or be involved in an accident. That is the effect of reserved karmas of previous lives,
Prarabhda. As I said, it is all well-defined.