On October 29, 2025, the object known as 3I/ATLAS will reach its closest point to the Sun, offering what may be the clearest clues yet about its origins. At about 203 million kilometers from the Sun, ...

Here on Earth, dust is a collection of small particles originating from geological sources, such as rocks, as well as other materials like pollen, dirt, bacteria, or pollutants. In space, dust ...