A comet from another star system is carrying water unlike anything astronomers have ever measured in our cosmic neighborhood.

Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically different from anything known to have ever formed around our sun ...

The interstellar comet 3I/ATLAS was the third object ever discovered in our solar system that originated from another star system. Despite a viral conspiracy theory, NASA officials have repeatedly ...

An interlaboratory comparison across nine metrology institutes found generally good agreement in solar cell calibration under ...