A team of astronomers has measured the passing of a super-Earth in front of a bright, nearby Sun-like star using a ground-based telescope for the first time. Exoplanet 55 Cancri e, some 40 light-years away, is about twice as big and eight times as massive as the Earth.
Researchers at MIT, the University of Colorado and elsewhere have found that very low-frequency electromagnetic waves in the Earth’s upper atmosphere form a shield, protecting the planet’s surface from the Van Allen belt’s high-energy radiation.
Launched in 2007, Nasa’s Dawn spacecraft orbited and surveyed large asteroid Vesta between July 2011 and September 2012. This detailed map is the culmination of a two-and-a-half-year geological mapping campaign.
NASA’s newest Mars orbiter has formally started a one-year research campaign to study an ancient case of climate change that starved the red planet of water, breathable air and potential life, scientists said Monday.