Planetary Science Institute, Tucson, Arizona, Author at Astronomy.com

Exoplanets, Planets, Robotic Spaceflight, Solar System

Stellar occultation offers new insights on Enceladus’ geysers

Tales of a tilting Moon hidden in its polar ice

Alien Life, Exoplanets, Planets, Solar System

Site of martian lakes might have been linked to ancient habitable environment

Comet ISON details emerge as it races toward the Sun

Exoplanets, Planets, Solar System

Mars crater may actually be ancient supervolcano

Scientists discover factors to predicting changes in comet rotation

Robotic Spaceflight, Solar System

Dawn spacecraft offers first look at giant asteroid’s chemistry

Science, Solar System

Researchers gain new insights into Comet 103P/Hartley