JWST imaged 2024 YR4 in late March, making it the smallest object the telescope had imaged to date. The data its instruments collected indicate that based on the amount of heat it gives off, 2024 YR4 ...

NASA is closely monitoring a bus-sized asteroid, “2025 XF1,” which is rapidly approaching Earth this week. With speeds of nearly 8,000 miles per hour, the space agency’s observations are critical for ...