Sun

When is the Winter Solstice, and What Is it All About?

This bizarre day is full of amazing sky-related stuff

When does spring start?

After the Shortest Day of the Year, Get Ready for Sunlight!

When Earth is Closest and Farthest from the Sun in 2026

Celebrating Natural Symbols of the Winter Solstice

Curious Ways Our Ancestors Tracked the Seasons

Everything You Should Know About the Longest Day of the Year

Facts, Folklore, and Everything You Need to Know About the Fall Equinox

Why the Earliest Sunset of the Year is NOT on the Solstice

It's Hot, Hot, Hot this Summer! See Average Temperatures for Your Region

Compass-Free Navigation: Survival Tips for Hiking & Camping

A Closer Look at the Mysterious Fall Equinox

And What That Means for Earth's Weather

Yes.. It Gets Dark Earlier After The Solstice.

Discover why dewpoint matters more than relative humidity for how muggy or comfortable the air really feels.

The Three Different Types of Twilight

Learn Something New About the Longest Day of the Year!

Simple geometry explains why this is true on cloudy days.

How Rare is a Solstice Full Moon?

Positive benefits of being out in the Sun

Fun Facts and Frequently Asked Questions About the March Equinox

Watching the sun, stars, Moon—and dust bunnies!

The Latest News for Solar Cycle 25

Where the Northern Lights Are Visible, and What Causes the Auroras

What is the Sun made of? And other burning questions!

What Goes Into an Aurora Forecast

Here Comes the Sun!

The dark patches on the Sun explained.

Learn all about the 11-year solar cycle and why it matters

A Crescent Moon Smile

Could a Deep Solar Minimum Bring About a New Ice Age?

How the Sun rises and sets across the seasons

How to Watch a Solar Eclipse

What it Takes to be a Star