4-Billion-Year-Old Relic From the Early Solar System Is Headed This Way4-Billion-Year-Old Relic From the Early Solar System Is Headed This Way
<p></p> <p>NASA’s <a href="https://www.nasa.gov/mission_pages/hubble/main/index.html" target="_blank" rel="noopener">Hubble Space Telescope</a> has determined the size of the largest icy comet nucleus ever seen by astronomers.</p> <p>The estimated diameter is approximately 80 miles (120 km) across,