Given the task definition and input, reply with output. You are given a passage. Using the information present in the passage, you need to classify it into one of the 10 topics: 0 - 'Society & Culture', 1 - 'Science & Mathematics', 2 - 'Health', 3 - 'Education & Reference', 4 - 'Computers & Internet', 5 - 'Sports', 6 - 'Business & Finance', 7 - 'Entertainment & Music', 8 - 'Family & Relationships', 9 - 'Politics & Government'.

In a sense, any microphone is picking up sounds from the past, due to the speed of sound. This is similar to what you mentioned with radio telescopes.

The main differences are 1) velocity -- light moves at about 1 foot per nanosecond while sound moves around 1 foot per 1/1000 second, and 2) that sound moving though a medium diffuses quite rapidly. Something really loud, like thunder, you might hear from 20-30 seconds away. For normal, everyday sounds, the delay won't be more than maybe a few tenths of a second.
1