This week will be the only chance to ever observe Comet Leonard — one of the brightest comets to pass by the planet Earth. Comet C/2021 A1 (Leonard) was discovered in January by Astronomer Greg ...

Interstellar comet 3I/ATLAS will soon reach its closest distance to Earth, so this may be our last, best chance to see this rare object before it heads back out into the universe, never to return. One ...

Interstellar comet 3I/ATLAS made its closest approach to Earth on Friday, Dec. 19. The comet will pass within about 170 million miles of Earth and poses no danger. Scientists are studying the object ...

Interstellar comet 3I/ATLAS has just swept past our planet, a brief encounter with an object that was born around another star and will never return. Its flyby offered astronomers a rare chance to ...

Interstellar comet 3I/ATLAS made its closest approach to Earth on Friday, Dec. 19. The comet will pass within about 170 million miles of our planet and poses no danger. While not visible to the naked ...

The comet is the 3rd interstellar object ever detected and got its name from the ATLAS telescope that discovered it. NASA officials have rejected conspiracy theories that the object could be an alien ...

Recently discovered Comet C/2025 R3 (PanSTARRS) will make its closest approach to the sun and Earth in late April and could ...

Darryl Z. Seligman is an Assistant Professor of Physics and Astronomy at Michigan State University. Comet 3I/ATLAS is the third large interstellar visitor that we have ever discovered —- an asteroid ...

Everyone's favorite interstellar comet, 3I/ATLAS, flew past Earth overnight, coming within about 168 million miles (270 million kilometers) of our planet. When you purchase through links on our site, ...

Interstellar comet 3I/ATLAS made its closest approach to Earth on Friday, Dec. 19. The comet will pass within about 170 million miles of our planet and poses no danger. The comet is too faint to be ...

This is great news for planetary defense. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The path of comet 3I/ATLAS through the solar system has ...