Using cutting-edge theoretical models and data from NASA's Chandra X-ray Observatory, scientists have transformed ...

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth. The best candidate yet for the elusive Planet Nine has been spotted in two ...

visible in the mid-infrared band. Results of the new observations, published Feb. 28 on the arXiv pre-print server, shed more light on the properties and nature of these rings. Planetary nebulae ...