Astronomers are preparing to study a dwarf planet that last came near Earth 11,000 years ago. Sedna is moving closer to the Sun, and this has intrigued experts who are eager to learn about the distant ...

Named 3I/ATLAS, the object reportedly rich in water ice was discovered on July 1 by the ATLAS survey telescope in Chile, when it was about 416 million miles (670 million kilometers) from the Sun.