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Exoplanets
Stars
Milky Way
Galaxies
Exotic Objects
Cosmology
Observing
In The Sky
Upcoming Events
The Sun
The Moon
Planets
Comets
Deep-Sky Objects
Observing Basics
Telescopes and Equipment
Astrophotography
Gear Guide
This Week in Astronomy
Space Exploration
What’s Launching This Week
Human Spaceflight
Robotic Spaceflight
The Magazine
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Author:
Jaclyn Champagne, JASPER Postdoctoral Researcher, University of Arizona
Exotic Objects
,
Science
Why are some black holes bigger than others? An astronomer explains
Exotic Objects
,
Science
Powerful black holes might grow up in bustling galactic neighborhoods
