How to prevent crashes between orbiting satellites

Thousands more satellites will soon orbit Earth. We need better rules to prevent space crashes. Source: https://earthsky.org/space/satellites-prevent-space-crashes…

What are degrees, arc minutes and arc seconds?

How do skywatchers measure distances in the night sky? Here’s how to understand it when they speak of objects as being several degrees (or several arc minutes or arc seconds) apart. Source: https://earthsky.org/astronomy-essentials/sky-measurements-degrees-arc-minutes-arc-seconds…

Earth faster, closer to Milky Way black hole, than previously thought

A new survey of our galaxy by astronomers with VERA in Japan has shown that Earth is both moving faster and is closer to the supermassive black hole at the center of our galaxy than previously thought. But don’t worry, our planet is safe! Source: https://earthsky.org/space/earth-faster-closer-to-milky-way-central-black-hole…