Astronomy: The Quasi-Quasars

As astronomers probe outward in space, they are looking backward in time, because the light that they see from very distant objects started its journey millions of years ago. They see the light from stars that no longer exist, and chart strange, starlike objects that could hold the secret of how the universe began. Quasars (for quasi-stellar radio sources) are the most intriguing of these objects, the oldest and most brilliant things in the observable universe, and the sources of powerful and mysterious radio waves. Now astronomers have identified a new class...

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