Fifty Years Ago, a Grad Student’s Discovery Changed the Course of Astrophysics

By identifying the first pulsars, Jocelyn Bell Burnell set the stage for discoveries in black holes and gravitational waves By Lorraine Boissoneault The dipole array telescope—a mass of wires and poles stretched across an area the size of 57 tennis courts—took Cambridge University students more than two years to build. But after the telescope was finished […]

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Generation Ships

When it comes to crossing the vast gulfs between the solar system and other stellar systems, SF writers turn to two main solutions: small and fast1 or big and slow. Perhaps the best known example of “big and slow” is the generation ship, large enough to qualify as a large town or even a small nation, […]

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