Astronomy & Space

Look closely at this image from NASA’s Hubble Space Telescope and you’ll see galaxies of various shapes and sizes clustered together toward the center-left of the image. A few foreground stars shine…

Venus and Jupiter — the Evening Star and the False Evening Star — draw closer together in the western twilight and point down to Mercury. The waxing Moon shows off its rich telescopic detail.
The…

Elon Musk’s SpaceX postponed the highly anticipated launch of its upgraded Starship megarocket, calling off Thursday’s test after multiple countdown stops-and-starts.

New research suggests that Triton — or a Triton-like object — might have disrupted Neptune’s original moon system. Nereid might be the sole survivor.
The post Nereid Could be Neptune’s Only…

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…

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 &…