A new theory published today in The Astrophysical Journal Letters by scientists from Harvard University suggests that the Sun may once have had a binary companion of similar mass. If con...

The debate over the origins and molecular structure of 'Oumuamua continued today with an announcement in The Astrophysical Journal Letters that despite earlier promising claims, the inter...

A hot Jupiter is a gas giant exoplanet roughly similar to Jupiter in our solar system but orbiting so close to its host star (with a period less than about ten days) that its atmosphere i...

Recent observations of Betelgeuse have revealed that the star's unexpected and significant dimming periods in late 2019 and early 2020 were most likely caused by the ejection and cooling ...

Cambridge, MA - Scientists at the Center for Astrophysics | Harvard & Smithsonian (CfA) announced today the discovery of a complex set of spiral arms extending to 1000 astronomical un...

The direct detection of gravitational waves from at least eleven sources during the past five years has offered spectacular confirmation of Einstein's model of gravity and space-time, whi...

Cambridge, MA - Scientists from the Center for Astrophysics | Harvard & Smithsonian and the New Jersey Institute of Technology today announced the first successful measurement and cha...

The heliosphere is the bubble-like cavity around the Sun, created by the solar wind, that extends well beyond Pluto until the pressure of the interstellar medium ultimately terminates it....

Cambridge, MA - VERITAS Collaboration have measured the angular diameter of stars using Stellar Intensity Interferometry for the first time in nearly 50 years, and demonstrated both impro...

Don Quixote (alias Near-Earth Object NEO 3552) was discovered in 1983.  Subsequent infrared and optical observations measured its diameter as about 18.7 kilometers, making it the thi...