<documents_info>The Crab Nebula: Remnant of a Supernova,Supernova 1987A: Observations and Implications,Type Ia Supernovae as Standard Candles,The Role of Supernovae in Galaxy Evolution</documents_info>
<query>What can we learn about the universe by studying supernova remnants like the Crab Nebula?</query>
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<documents_info>The Crab Nebula: Remnant of a Supernova,Supernova 1987A: Observations and Implications,Type Ia Supernovae as Standard Candles,The Role of Supernovae in Galaxy Evolution</documents_info>
<query>What can we learn about the universe by studying supernova remnants like the Crab Nebula?</query>
user
Chunk
assistant
<query>What can we learn about the universe by studying supernova remnants like the Crab Nebula?</query>
<documents_info>The Crab Nebula: Remnant of a Supernova,Supernova 1987A: Observations and Implications,Type Ia Supernovae as Standard Candles,The Role of Supernovae in Galaxy Evolution</documents_info>