Tag Archives: diameter of the earth

Severe geomagnetic storm alert issued for first time in 19 years

A severe G4 geomagnetic storm could emerge as early as Friday, prompting NOAA officials to trigger a storm of that magnitude for the first time in nearly 20 years. The hour comes after days of solar activity that sent several bursts of plasma and magnetic fields toward Earth. G4s are the second strongest form of… Read More »

The northern lights will be visible in parts of the United States this weekend. Why are they so active right now?

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news about fascinating discoveries, scientific advancements and more. A series of solar flares and coronal mass ejections from the sun have the potential to create dazzling auroras that could be seen as far south as Alabama and Northern California, as well as disrupt… Read More »

What NASA will learn from a mission to a wild world

Uranus, the seventh planet from the Sun, orbits the outer solar system about two billion miles (3.2 billion kilometers) from Earth. It’s a huge world; It is four times the diameter of Earth, 15 times its mass, and 63 times its volume. Uranus, which has not been visited by spacecraft in more than 35 years,… Read More »