Explainers
POLO pathway: a hidden drain at the back of the eye
A Canadian team reports a lymphatic drainage route behind the retina, traced so far in mice, that may clear waste from the eye.
Dev Malhotra
Space
Outer Space Treaty ratified Oct. 10, 1967
The international agreement set rules for peaceful use of space and banned territorial claims on celestial bodies.
Astronomy
Star slowly devours brown dwarf in billion-year feast
MIT-led team finds a star 300 light-years away steadily eating a brown dwarf, a process that could continue for billions of years.
Sky guide
Orion's sideways rise shows how the sky moves
As Orion rises in mid-October, the familiar constellation appears on its side before slowly swinging upright, a visible lesson in Earth's rotation.
Space
NASA's SSPICY Mission to Inspect Dead Satellites
The spacecraft launched Oct. 1 and will test technologies needed for future orbital repairs and debris cleanup.
Space
Soviet satellite Meteor 2-7 breaks apart in orbit again
The 1981 spacecraft fragmented into tens of pieces, the latest in a string of breakup events that experts call a worrying trend for space safety.