TESS Turned Old Exoplanet Images Into a Dwarf-Planet Search
A clever star-subtraction and image-stacking method pulls a distant dwarf-planet candidate out of TESS data recorded years before its discovery.
solar system
The Main-Belt Asteroid Growing a Tail in an Unlikely Place
A machine-learning alert revealed a tail around asteroid 6993, where sunlight may be too weak for the usual icy explanation.
Why Is This Near-Sun Asteroid So Much Darker Than Expected?
A nearly 5-kilometer asteroid orbiting inside Earth reflects only about 2% of visible light, leaving its birthplace an open question.