SPEEDY COMETS “Dark Comets,” by Robin George Andrews, describes a group of objects in our solar system with “unexplained” ...

A n asteroid the size of a skyscraper is approaching Earth at a sprightly 24,136 miles per hour—and will be at its closest to ...

3I/ATLAS, an interstellar object currently zipping through the solar system, is capturing the attention of astronomers, the public and even most of our deep space assets. Its hyperbolic orbit tells us ...

The period known as "cosmic noon," which took place roughly 2 to 3 billion years after the Big Bang, was characterized by the ...

According to Dean Duffy, the new NASA administrator, a rock sample collected by the Perseverance rover was the "clearest sign ...

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

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

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

The sun has become increasingly active since 2008, a new NASA study shows. Solar activity is known to fluctuate in cycles of 11 years, but there are longer-term variations that can last decades. Case ...

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

The long-standing idea of planets forming in perfectly flat, orderly discs has been challenged by new research. Instead of ...

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.