We're getting closer and closer to finding a real Earth-like exoplanet. But finding one is only half the battle. To truly know if we're looking at an Earth analog somewhere else in the galaxy, we have ...

Have scientists finally confirmed the existence of the first exomoon? This is what a study released on the preprint server arXiv, and accepted for publication in Astronomy & Astrophysics, hopes to ...

A long-proposed tool for hunting planets has netted its first catch: a Jupiter-like planet orbiting one of the smallest stars known. Astronomers first attempted the technique, called astrometry, 50 ...

Over the last 20 years Hubble Space Telescope Fine Guidance Sensor interferometric astrometry has produced precise and accurate parallaxes of astrophysical interesting stars and mass estimates for ...

When not performing OSETI observations, appropriately trained observers can make precise measurements of the position and magnitude of recently discovered or poorly observed asteroids and comets.