How big is the Sun? With a diameter of some 864,000 miles (1.39 million km), the Sun dwarfs any other object in our solar system. In fact, you could fit about 1.3 million Earths inside it.

When the sun becomes a red giant in around 6 billion years — a billion years after it runs out of hydrogen at its core — it will expand to around the orbit of Mars, swallowing the inner ...

Filaments are cooler, dense ribbons of solar plasma that can hang suspended above the sun's surface by magnetic fields, according to NOAA.When these become unstable, they can erupt dramatically ...

Incredible new images of the sun's surface provide an unprecedented view of raging sunspots and solar activity. A new high-resolution camera system developed by the Leibniz Institute for ...

At solar observatories scattered throughout the U.S., astronomers reached for their telephones one day last June and called the White Sands Missile Range in New Mexico. Each observer had spotted ...

A massive solar tornado, big enough to swallow the Earth, was observed twirling across the surface of the "quiet" sun last week. Using a telescope made from second hand parts, including part of an ...

When the first U.S. astronauts make a lunar landing in late 1968 or 1969, many of the world's telescopes will be focused on their activities. But there will be some important exceptions. In seven ...

Next, according to the 2019 study, a wave of high-energy protons, accelerated by shockwaves in the sun’s atmosphere, would hit Earth. These could further cripple satellites, compromising global ...

The research effort consists of over 40 teams around North America who will be taking images of the Sun with special solar telescopes to catch the Sun’s violent storms called Coronal Mass Ejections.

The Sun Giant 'senior citizen' sunspot on 3rd trip around the sun could break a century-old record. The Sun A mysterious, 100-year solar cycle may have just restarted. ... Latest in Astronomy.

The solar wind is one of the biggest topics in modern astronomy. A peculiar world of plasma. ... Nakariakov says that the Sun is, therefore, less like a guitar and perhaps more like a violin.

UNDATED (WKRC) – Scientists say that they captured the moment that a part of the sun’s plasma broke off and was swept into a polar vortex.