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

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

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

Seasonal changes are caused by Earth's 23.5-degree axial tilt, not its distance from the Sun. When a hemisphere leans towards the Sun, it receives direct sunlight and experiences summer, while the ...

The similarities are astonishing. And yet... The post NASA Telescope Discovers Nearby Planet With Deep Similarities to Earth ...

The Sun has snapped into a hyperactive mood, unleashing a rapid-fire sequence of powerful eruptions just as a volatile ...

Sun solar flares disrupted parts of Earth this week after a highly active sunspot unleashed the strongest eruptions seen so ...

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

We won't experience a leap year this year, but one is right around the corner. Here's when the next leap year falls on 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.

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

Prior to computer technology, how did astronomers so precisely predict solar eclipses? Kurt PetersenSheboygan Falls, WI What a wonderful question! The simple answer is that they relied on centuries of ...