Sky & Telescope Magazine

For most of human history, the sky was not something we studied — it was something we lived with.

The post Stonehenge and the Geometry of the Sky appeared first on Sky & Telescope.

A new model explains how Ganymede got its molten core — which in turn has given Jupiter's largest moon its magnetic field.

The post How Jupiter’s Moon Ganymede Melted Its Core appeared first on Sky & Telescope.

An innovative new mission will probe the mystery of how the Earth’s magnetosphere interacts with the solar wind.

The post SMILE: European Space Weather Mission Launches appeared first on Sky & Telescope.

Astronomers have identified the likely source of gas that flows into the maw of the Milky Way’s central black hole, Sagittarius A*.

The post What's Feeding Our Supermassive Black Hole? appeared first on Sky & Telescope.

The Moon, Venus, and Jupiter — the three brightest celestial objects after the Sun — will form up beautifully in twilight this Monday, Tuesday, and Wednesday.

The post This Week's Sky at a Glance, May 15 – 24 appeared first on Sky & Telescope.

A planetary odd couple — a mini-Neptune and a hot Jupiter — probably formed much farther away from their star before migrating closer in.

The post How Did This Peculiar Planet Pair Form? appeared first on Sky & Telescope.