This long-duration comet will make its closest approach to Earth this fall, before disappearing into the outer solar system for another 1,000 years. Comet Lemmon (C/2025 A6) photographed in Texas in late September 2025. It was early January 2025 when a faint light spot was observed at the Mt. Follow-up observations revealed that the object was a comet visiting from the outer edge of the solar system, and it was named Comet Lemmon (C/2025 A6). Its "period"--the time it takes to complete its lengthy orbit of the sun--is about 1,350 years.

Dust collected from an asteroid by a NASA spacecraft more than 200 million miles away from Earth contains material that is older than the sun. Scientists have analysed samples from the Bennu asteroid, which resembles the Death Star space station in the Star Wars films, and found it is'chemically primitive'. It contained'presolar grains' which are stardust that formed around dying stars billions of years ago. The samples provide a glimpse into the outer Solar System during the birth of the sun and are more pristine than any meteorite on Earth, according to a team of researchers. NASA spacecraft Osiris Rex briefly touched the surface of Bennu with a robotic arm and collected 120g of material which was put into a capsule before it returned to earth in 2023.