Appearing as a dark void in ultraviolet images, it signals a region where solar wind is escaping at speeds exceeding 1.8 million mph toward Earth ... latitudes than usual. As the Sun nears ...

Jaw-dropping new close-ups of the Sun reveal "moss," "rain" and an eruption bigger than Earth. ESA's Solar Orbiter ... the Sun's lower atmosphere to the much hotter outer corona.

When looking at the sun, it may seem far away, but according to experts, we are still within the sun’s atmosphere, also called its heliosphere. Here on Earth ... only on a much bigger level.

The heat and light from the Sun is felt and seen on Earth. Stars are orbited by planets. The Sun is roughly spherical in shape and is much, much bigger than the Earth. 1,300,000 times bigger!

Look at how the Earth's tilt changes how much sunlight the northern ... which part of it is facing the Sun. When the lit area of the Moon we see is getting bigger each day, we say the Moon is ...

Astronomers on Wednesday announced that Pluto, located a chilly 3 billion miles away from the sun, likely ... of ice with more than twice as much water as there is on Earth (some 320 million ...