The ion tail appeared as Comet C/2025 R3 PanSTARRS was about 45 million miles from Earth (72 million kilometers) during its ...
Astronomers analyzed the vapors coming off the comet when it neared the sun and found it had a lot of "heavy" water. That ...
Comet C/2025 R3 (PanSTARRS) is making its closest approach to Earth on April 26, just a week after surviving an intense pass near the Sun. The comet is visible to the naked eye under dark southern ...
On April 13, 2029, a chunk of rock roughly the size of the Eiffel Tower will thread the gap between Earth and the ring of communications satellites that orbit our planet. The asteroid, named 99942 ...