Three celestial bodies are about to meet up for one night in September in a conjunction that should be widely visible in the ...

Letters to the editors for the May 2025 issue of Scientific American ...

The idea was that high-powered lasers would propel tiny probes to 20 percent of the speed of light, impelling them with ...

Three celestial bodies will meet up for one night in September in a cosmic conjunction that should be widely visible in the ...

An international team led by the University of Geneva (UNIGE), including scientists from the National Center of Competence in ...

What if we could visit another star? Proxima Centauri is the closest star to our solar system and it has a potentially ...

Venus is often called Earth's twin - but it hides a hellish reality beneath its clouds. With surface temperatures hotter than ...

It’s been just over 48 years since Voyager 1 was launched on September 5, 1977 from Cape Canaveral, originally to study our Solar System’s planets. Voyager 1 would explore Jupiter and ...

University of Virginia astronomy undergraduates focus on the shadows of asteroids and dwarf planets for their Earth-bound ...

While Mars today only has a wispy remnant of an atmosphere, it may once have had one hundreds of times thicker with a ...

Three celestial bodies are preparing to meet up for one night in September in a cosmic conjunction that should be widely visible in the sky.

A sci-fi idea is gaining supporters, from billionaires to city councils. Whether it's feasible is another matter.