Sky & Telescope Magazine

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.

Two objects that appeared to be galaxies residing in a universe about 150 million years old turn out to be brown dwarfs in the Milky Way.

The post Webb Telescope Reveals Brown Dwarfs Masquerading as Early Galaxies appeared first on Sky & Telescope.