When does summer end? The calendar tells us one thing, but astronomy tells us something else. See how meteorologists officially determine the end of summer.
Did you know there are 3 different kinds of twilight that take place before sunrise and after sunset? Hare are the official definitions for the 3 twilights: civil twilight, nautical twilight, and astronomical twilight.
The ozone layer is found in the stratosphere and helps protect us from ultra violet light. Find out about the ozone hole and how nations around the world are helping to fix it.
The outer layer of our atmosphere (the exosphere) is a mysterious place between the atmosphere & outer space. See how high up it is & how scientists tell where outer space begins.
Everything you need to plan a Northern Lights trip - where to see Aurora Borealis in the US, best time of year & time of day to see the Northern Lights, and best apps & sites to stay up-to-date with the Aurora Borealis lights near you.
A space hurricane is a type of aurora borealis (Northern Lights). Space hurricanes are cyclone-like auroras in the sky. Here's everything you want to know!
See the ONLY time it's safe to view a solar eclipse with your naked eyes, 4 things to look for when buying eclipse glasses, and how to make a pinhole viewer.
