The sun reaches the March equinox at 5:01 a.m. Eastern Daylight Time on March 20. This is when it crosses the equator heading northward. This moment marks the change of seasons: the beginning of ...

It’s a conundrum.” ...

There have been plenty of attempts to resolve the "Hubble Tension" in cosmology. This feature describes how one of the most important variables in cosmology, the expansion of the universe, takes on ...

In a new study, researchers present a detailed portrait of TOI-2076, a roughly 200-million-year-old planetary system that appears to be finishing its turbulent adolescence.

The largest stars in the universe live the life of a rock star - they are born brilliant, live fast and die young. If that is ...

Mars is not what it used to be. Once warm, watery, and blanketed by a thick atmosphere, today the Red Planet is cold, dry, and draped by a thin atmospheric veil. The main culprit is a relentless ...

Six planets are set to align on Saturday, creating a planetary parade that will be visible to sky-gazers across the globe.

Although astronomers have found thousands of exoplanets, the number of confirmed exomoons—and exorings—is still zero. But ...

“On most nights, weather permitting, you can spot at least one bright planet in the night sky,” NASA public engagement specialist Preston Dyches wrote in February 2025. “While two or three planets are ...

Scientists have long know many objects floating at the solar system's out edges resemble snowmen, but the reasons why were ...