Features

The Chronology of Planetary Bombardments

From an ancient era of massive bombardments to the present day, encounters with solar system debris have left their marks on the planets.

Anatomy of a Cosmic Jet

Astrophysicists are scrutinizing the high-energy jet spewed from the active galaxy M87 to determine what powers this fascinating object.

The Soviets Advance into the Solar System

The Red Planet is just the first stop in the Soviet Union’s ambitious plan of planetary exploration in the 1990s.

The Telescope That Defies Gravity

The designers of the world’s largest telescope, to open in 1990, have overcome gravity’s limits on the size of professional telescopes.

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