First its rotation slowed between March and May 2017, taking 46 hours to complete a spin where it had once taken only 20 hours. This occurred as the comet neared its closest point to the sun, roughly ...

Explore gravity's essential role in Earth's fast-paced journey through space and its impact on life and science.

Seasonal changes are caused by Earth's 23.5-degree axial tilt, not its distance from the Sun. When a hemisphere leans towards ...

A new candidate exoplanet appears to almost uncanny similarities to Earth — but may differ in at least one major way.

NOAA warns of likely G1-class geomagnetic storming on Saturday, Feb. 7, through Sunday, Feb. 8, as a coronal mass ejection ...

The asteroid, around 100 feet in diameter, is speeding toward our planet at about 22,000 miles per hour, according to NASA.

A massive sunspot, AR4366, erupted with dozens of solar flares in a single day, including the strongest storm of 2026. As it ...

A rapidly growing sunspot has fired off at least 18 M-class and three X-class flares in just 24 hours, including an intense X8.3 eruption.

The Sun turns, but not in the way a solid object would. It has no hard surface, no fixed edge to follow. What scientists ...

Many objects in space rotate. Earth completes a spin in roughly 24 hours, while Venus takes a whopping 243 Earth days. The ...

Astronomers have found thousands of exoplanets around single stars, but few around binary stars—even though both types of stars are equally common. Physicists can now explain the dearth.

Many people across Arkansas noticed a ring around the sun and moon at times this week. This ring is called a halo. If it appears around the sun, it’s a sun halo. If it appears around the moon, it’s a ...