Researchers discover our twin solar system, GJ676A – where everything is 4x larger

Astronomers have detected our “grotesque” twin: A planetary system arranged much like our own solar system, a new study says. Dubbed GJ676A, the system has two rocky planets orbiting close to its host star, and two gas giants orbiting far away. This means the system is arranged like our system—though in GJ676A, everything is much …

All 786 known planets, to scale

All 786 known planets, to scale. “This” (tiny gray box) is our solar system. The rest of these orbit other stars and were only discovered recently. Most of them are huge because these are the kind we learned to detect first, but now we’re finding that small ones are actually more common. We know nothing …

Voyager I – about to leave our Solar System

Last week, in the corners of the Internet devoted to outer space, things started to get a little, well, hot. Voyager 1, the man-made object farthest away from Earth, was encountering a sharp uptick in the number of a certain kind of energetic particles around it. Had the spacecraft become the first human creation to “officially” …

Scientists estimate billions of habitable planets in the Milky Way

Using results from the High Accuracy Radical Velocity Planet Searcher (HARPS) at the European Southern Observatory, the scientists say there are likely tens of billions of planets in the Milky Way galaxy alone that may be able to sustain life. They estimate that one hundred of those planets are in the sun’s immediate neighborhood — …

Photo – the most volcanic body in our solar system – Jupiter’s moon Io

How big is Jupiter’s moon Io? The most volcanic body in the Solar System, Io (usually pronounced “EYE-oh”) is 3,600 kilometers in diameter, about the size of planet Earth’s Moon. Gliding past Jupiter at the turn of the millennium, the Cassini spacecraft captured this awe inspiring view of active Io with the largest gas giant …