"This is an object from a part of the galaxy we've never seen up close before." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The recently ...

3I/ATLAS, an interstellar object identified by NASA as a comet, recently passed its closest point to the sun. Scientists around the world are observing its months-long journey to learn more about the ...

CREDIT: ALMA(ESO/NAOJ/NRAO)/M. McClure et al. Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent six days a week. Terms of ...

Most comets, including the well-known Halley's, loop through our solar system like cosmic time capsules that formed alongside our Sun and planets around 4.5 billion years ago. But every now and then, ...

The comet, discovered in July 2025, originated far beyond our Solar System and is thought to be around 7 billion years old - ...