Here is a look at just a few of the biggest developments in astronomy that The Debrief has been tracking in 2025.

A comet shouldn’t have a heartbeat. Yet NASA’s latest images of the interstellar object 3I/ATLAS detail just that: jets of gas and dust brightening and dimming in an exact rhythm once every 16.16 ...

In the many decades of NASA exploration, there has only been one detection that got on that scale. It was collected by the ...

From stranded astronauts to secret moons to space photos that were once impossible to consider, here are the top space ...

Space is always inspiring and 2025 was no exception, with finding Betelgeuse’s buddy, debuting a prolific survey telescope ...

Comet 3I/ATLAS was discovered on July 1, 2025, by the NASA-funded ATLAS telescope in Rio Hurtado, Chile and was quickly ...

NASA spacecraft Parker Solar Probe and Europa Clipper observed interstellar comet 3I/ATLAS before its close approach to Earth. Scientists are studying the data as the comet heads toward Jupiter in 202 ...

Looking ahead, the comet will pass roughly 33 million miles from Jupiter in March 2026. Loeb noted the scientific value: monitoring 3I/ATLAS with the Juno spacecraft could reveal unusual activity, ...

Using the WISPR (Wide-Field Imager for Solar Probe) instrument aboard NASA’s Parker Solar Probe, scientists observed the interstellar comet 3I/ATLAS from October 18 to November 5, 2025.

Scientists are turning their attention to a rare interstellar encounter expected in March 2026, when comet 3I/ATLAS is ...

On Dec. 20, commander Reid Wiseman, pilot Victor Glover, and mission specialists Christina Koch and Jeremy Hansen emerged ...

From an interstellar comet to breathtaking auroras and from brand-new rockets to iconic space telescopes, here are some of our favorite images from the cosmos in 2025 ...