Summary
The discovery of ancient, massive quasars suggests early galaxies grew faster than expected.
Key Points
3 points1
Quasars are luminous objects powered by supermassive black holes at the centers of young galaxies.
2
These quasars are the oldest and most massive found to date.
3
Their existence forces scientists to rethink models of early galaxy formation.
New Words to Learn
6 wordsquasar
a very bright object in space created by a huge black hole feeding on surrounding material
supermassive black hole
an extremely large black hole with a mass millions to billions of times that of the Sun
galaxy
a massive system of stars, gas, dust and dark matter held together by gravity
telescope
an instrument that collects light to see distant objects
model
a scientific idea or theory that explains how something works
rethink
to consider something in a new or different way
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