Question

read the excerpt from chapter four of windows to the universe: revolutions in astronomy. even before nasa launched the hubble space telescope in 1990, scientists were already planning for the next generation of space telescopes. which best explains the purpose of this sentence with regards to the organization of the chapter? it explains how hubble led directly to the creation of jwst. it compares hubble and jwst to highlight their differences. it introduces hubble as a problem that nasa needed to solve by developing jwst. it establishes a chronological connection between the development of hubble and jwst

Explanation:

The sentence mentions that before the Hubble Space Telescope was launched in 1990, scientists were planning for the next - generation (which could be JWST). This indicates a time - related (chronological) link between the development of Hubble (launched in 1990) and the next - generation telescope (JWST). It doesn't directly say Hubble led to JWST's creation (no details of a direct causal mechanism), it doesn't compare their differences (no mention of features to contrast), and it doesn't present Hubble as a problem (just that it was launched and planning for the next - gen was already happening).

Answer:

It establishes a chronological connection between the development of Hubble and JWST.