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Researchers have pushed back on NASA's claims that 3I/ATLAS is an ordinary comet, just hours before it makes its closest ...

On Friday, December 19, 2025, comet 3I/ATLAS will make its closest approach to Earth. 3I/ATLAS can be found near the ...

In November, SETI Institute researchers contributed expert perspective to media stories on interstellar comet 3I/ATLAS and ...

As the world's largest radio/radar telescope when it was commissioned in 1963, the Arecibo Observatory saw countless firsts, from revealing the ...

Almost a thousand years since its formation, the Crab Nebula sports complex shells of plasma, filled with tendrils, filaments ...

Even the best telescopes can’t see exoplanets. It’s all about watching for jiggly stars, blue shifts, and transits.

Astronomers have followed 3I/ATLAS since its discovery on July 1. Hubble photographed it on July 21 from 277 million miles away, revealing a teardrop-shaped cloud of dust wrapped around its icy core.

It’s also the perfect place to learn about the Geminid meteor shower, which peaks this weekend. Texas Standard hit the road ...

The cold and remote planets originally earned their label of "ice giants" to contrast their interiors from those of Jupiter ...

What the Soviets Found on Venus reveals a hellish surface, reanalyzed Venera data, and why those probes still guide today’s ...

With major eclipses, brilliant supermoons, and lineups of five or more planets, 2026 offers something awe-inspiring in every season. Here’s what to watch for.