An object from outside our solar system is behaving in ways scientists did not expect. As it approaches the inner system, its brightness, jets, and structure are changing unpredictably. This episode ...

Out in the Kuiper Belt, the massive doughnut of debris beyond Neptune, about one in 10 kilometer-scale objects have surprised scientists with their unexpected shape. Rather than resembling a ball, ...

An international team of astronomers has discovered a distant planetary system that challenges long-standing theories of how ...

This discovery has drawn interest from both professional researchers and skywatchers because comets are ancient remnants from the early formation of ...

Observations of interstellar object 3I/ATLAS show increased water, carbon dioxide, and organic gas release after its passage near the Sun, based on data from NASA’s SPHEREx mission ...

From nocturnal wildlife safaris to stargazing train rides, this dark sky expert shares her top astrotourism experiences around the world.

Now, according to a new study published in The Astrophysical Journal, there could be a pulsar at the center of our Milky Way—and it could open a new chapter in physics. Researchers from Columbia ...

While we tend to think of the night sky as a permanent, unchanging backdrop to our lives, the reality is […] ...

Astronomers have reported one of the longest stellar dimming events ever recorded, with a Sun-like star fading by 97 percent for nearly 200 days. Astronomers believe one of the longest stellar dimming ...

Long strands of glowing gas stretch behind a distant galaxy, dotted with pockets of newborn stars. The shape looks almost ...

A NASA planetary defense officer warns thousands of near-Earth asteroids capable of destroying a city remain undetected.

WASHINGTON – Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that formed beyond the orbits of its gaseous neighbors, possibly after ...