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There are different kinds of black holes! Some are the endpoint of a massive star's life. 
Mystery #1 for #NASAWebb, how did the first black holes form? https://go.nasa.gov/2JoF5H6
#BlackHoleFriday #BlackFridaypic.twitter.com/5E1MSsS03g
Some black holes are supermassive and lie at the heart of galaxies.
Mystery #2 for #NASAWebb, what is the relationship between black holes and their host galaxies? https://go.nasa.gov/36euKXo
#BlackHoleFriday #BlackFridaypic.twitter.com/wsdIlYiL2O
Mystery #3: What happens to the black holes at the centers of colliding galaxies?
#NASAWebb will investigate: https://go.nasa.gov/39mJO7u
#BlackHoleFriday #BlackFridaypic.twitter.com/ArTTj0skyc
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But if you must, here’s a travel guide to help you survive the trip: