Overview
- NASA’s Chandra X-ray Observatory imaged extended X-ray emission forming an astrosphere roughly 200 astronomical units across around HD 61005.
- HD 61005 is a Sun-like star about 100 million years old located approximately 120 light-years away.
- Analysis indicates a stellar wind about three times faster and roughly 25 times denser than today’s solar wind, heating surrounding gas to X-ray temperatures.
- Infrared observations show a dense “Moth” dust environment reported to be about 1,000 times thicker than around the Sun, shaping the bubble and enabling its detection.
- Researchers describe this as the earliest external astrosphere observed around a Sun analogue, providing data to refine models of heliosphere evolution and young-planet space weather; the study appears on arXiv and has been accepted by the Astrophysical Journal.