For years we have observed the compelling fluvial features on the Martian surface. How did they get there? Was there a large ocean? Check out the very first measurements of how much water once flowed on Mars 4.5 billion years ago.
Mercury is the smallest planet in the Solar System, but some of its properties are a big challenge to explain. Today’s Astrobite presents a solution to one of these issues: The darkening of Mercury is induced by a high abundance of carbon delivered by meteorites.
Our Solar System is just plain odd compared to other star systems across our galaxy. Once again the finger of blame points towards the gas giant Jupiter as the simulations in this paper show.
Earth’s oceans may have originated mainly from accreted impactors. But do planets in other systems experience the same water delivery mechanism? Or do they even get more water than our world? Find out why you would want to think about this and what the consequences might be.
70,000 years ago, a binary star passed through the outskirts of the Oort Cloud–was it the closest known stellar encounter?
Most exoplanets are and have been detected by the transit method. Maybe, we can improve the method even further by drawing conclusions from the recent Venus transits in 2004 and 2012.