It's easy to think that Neptune is the coldest planet in the solar system because it is the farthest from the Sun. Astronomers have been puzzled for years by the fact that Uranus is the coldest planet ...

The official number of exoplanets—planets outside our solar system—tracked by NASA has reached 6,000. Confirmed planets are added to the count on a rolling basis by scientists from around the world, ...

A solar eclipse is what occurs when the moon comes in between the sun and the Earth, and a partial eclipse is what happens when that alignment is imperfect. The moon will only partly cover the sun, ...

The mysterious interstellar object traveling through our solar system has been spotted acting like no other comet ever seen before, revealing its alien origins. Scientists from Michigan State ...

Our sun has unexpectedly begun to ramp up its activity, which could lead to more severe solar storms that cause blackouts and disrupt global communications. NASA revealed that our solar system's home ...

NASA has thrown cold water on Harvard astrophysicist Avi Loeb’s theory that interstellar visitor 3I/ATLAS was sent to us by an extraterrestrial civilization — a sobering albeit unsurprising conclusion ...

As interstellar object 3I/ATLAS approaches its closest point to the Sun next month, the mysterious visitor continues to fascinate astronomers. The object, which is broadly believed to be a comet that ...

Editor's note: The September 2025 partial solar eclipse put on a magnificent show as the moon swept over the face of our sun, darkening the sky over a swathe of the Pacific Ocean. Check out our wrap ...

NASA has confirmed the discovery of Comet 3I Atlas, the third known interstellar object to pass through our solar system after ʻOumuamua and Borisov. Detected in July 2025 by the ATLAS telescope in ...

The new finding may solve an "astrophysics mystery that has stood for nearly half a century." Our sun's fiery flares are even more extreme than scientists had thought, blasting particles to ...

The intensity of the Sun’s activity ebbs and flows across years, but also across decades—a behavior that scientists haven’t quite figured out yet. At the turn of the 21 st century, astrophysicists ...