Definition: Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.
Input: The habitable zone (HZ) in astronomy is a region of space where stellar conditions are favorable for life as it is found on Earth.

In the study of space the habitable zone is an area where conditions are similar to Earth's allowing life to form.