Solar

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Articles about Solar

2,143 published items.

What Is Space Weather?
Space science

What Is Space Weather?

Space weather describes changing conditions in the Sun, solar wind, magnetosphere, ionosphere and thermosphere that can affect technology and operations near Earth. It i…

September 11, 2026
What Is a Geomagnetic Storm?
Space science

What Is a Geomagnetic Storm?

A geomagnetic storm is a prolonged disturbance of Earth's magnetosphere caused by enhanced energy transfer from the solar wind. The most significant storms are often ass…

September 11, 2026
What Is a Solar Flare?
Space science

What Is a Solar Flare?

A solar flare is a rapid release of magnetic energy in the Sun's atmosphere. Flares can brighten dramatically in X-rays and extreme ultraviolet radiation and can acceler…

September 11, 2026
How Do Scientists Forecast Auroras?
Space science

How Do Scientists Forecast Auroras?

Aurora forecasts combine measurements of the Sun and solar wind with models of Earth's magnetosphere. Scientists are not predicting a fixed light show at a precise stree…

September 11, 2026
What Are Exoplanets?
Space science

What Are Exoplanets?

Exoplanets are planets beyond our solar system. They range from small rocky worlds to giant planets and can orbit stars very different from the Sun.

September 10, 2026
How many planets are there in the universe?
Space science

How many planets are there in the universe?

Astronomers estimate there are about 100,000 trillion billion planets in the universe based on the assumption that every star has a planet orbiting it.

September 15, 2025