Astronomers have made the most extensive study yet of how magnetically active stars are when they are young. This gives scientists a window into how X-rays from stars like the Sun, but billions of years younger, could partially or completely evaporate the atmospheres of planets orbiting them. Source: [url=http://www.nasa.gov/mission_pages/chandra/images/chandra-sees-stellar-x-rays-exceeding-safety-limits.html]Chandra Sees Stellar X-rays Exceeding Safety Limits[/url]