Sun

The tropical year—or the length of time it takes for the Earth to go from one equinox to the next—is 365 days, 5 hours, 48 minutes and 45 seconds long.

The space rock will fly past our planet at a distance of around 3.6 million miles.

"Supermoon" is a popular term for a full moon occurring when our natural satellite is close to its perigee, or its minimum distance from the Earth.

The annular solar eclipse will pass over parts of Africa, Asia and Australia, but stargazers across the world can watch the event via livestream.

The space rock will sail safely past the Earth at around 26,000 miles per hour—roughly 30 times faster than the speed of sound.

The full moon in December has traditionally been referred to as the "Full Cold Moon" or the "Long Nights Moon."

Solar storms found to "profoundly modify" the foreshock—the region that extends beyond the magnetic field.

2019 TA7 is classified as a near-Earth object because its orbit around the sun takes it within 121 million miles of the star, and 30 million miles of Earth.

Scientists predict current solar cycle will come to an end in the first six months of 2020.

Eclipses such as 2019's event in South America give a highly-detailed snapshot of the solar atmosphere.

The infant was discovered in the vehicle nearly five hours after other children were offloaded at daycare.

The last time that a full moon and the spring equinox fell on the same day was March 20, 1981.

The jets were recorded coming from sunspots—temporary regions on the Sun with reduced surface temperatures.

The skin is our largest organ, and yet many of us are unsure how to care for it.

Scientists in China say harnessing solar power in space will provide an "inexhaustible source of clean energy."

Plasma—which reaches temperatures of hundreds of millions of degrees—is unstable, making it difficult to control.

Earth reached perihelion, the point at which the sun is closest to Earth, at 2:19 a.m. ET on January 3.

Today's Google Doodle features a winter-themed animation.

The prominence was about 10 times the diameter of Earth.

Here's what's in the forecast across the country.

The searing hot ball of gas at the heart of our planetary neighborhood is home to almost all the mass of the solar system—but it's getting lighter all the time.

Polarity changes can occur within centuries, not just over millennia.

In two weeks, the comet will travel closer to the Sun than Mercury.

The journey will last about seven years.

The Parker Solar Probe will zoom toward the sun at speeds of up to 430,000 miles per hour, making it the fastest spacecraft ever flown.

Reports of a cloud of darkness blocking out the Sun at noon above northern Siberia have raised questions.

Solar winds can impact power grids, GPS and even animal migration.

On Friday, the Moon will obscure a chunk of our star.

The Malanda Millaa Millaa Road was only recently repaired, but it did not hold up well in the sun.

The city zoo has made some provisions for a pleasant summer after last year's drab and rainy weather.