Scientists call it a “diffuse auroral eraser.” That’s because this newly named aurora first appears as a bright stripe over a diffuse auroral background. Then, when it disappears, it scrubs out the faint auroral light behind it.
Every year millions of tons of dust from the Sahara Desert are swirled up into the atmosphere and carried across the Atlantic. Research suggests that, as the climate changes, Saharan dust transport will decrease.
For Earth Day 2021 (April 22), NASA highlights science and technology that is helping us live more sustainably on our home planet and adapt to natural and human-caused changes. Here’s how to participate.