A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and Earth. The authors dubbed it Planet Y.

After marking the 30th anniversary of the discovery of the first exoplanet around a sun-like star, we now look forward to what the next 30 years might offer.

For millions of years, a fragment of ice and dust drifted between the stars—like a sealed bottle cast into the cosmic ocean. This summer, that bottle finally washed ashore in our solar system and was ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to reach somewhere truly empty?

Pittsburgh-based aerospace company Astrobotic and Honda’s North American subsidiary are working on integrating Astrobotic’s vertical solar array technology with Honda’s regenerative fuel cell system ...

A team of astronomers has attempted to track the path of interstellar object 3I/ATLAS back into the past, tracing its path through the galaxy in simulations involving over 13 million stars. On July 1, ...

Cambridge scientists have uncovered a hidden quantum mechanism in an organic semiconductor that could revolutionize solar energy. In a finding that connects modern research with ideas from a century ...

An interstellar comet named 3I/ATLAS moves through our solar system. Harvard astrophysicist Avi Loeb suggests it could be alien technology. This is due to its significant mass and size. NASA ...