Astronomy
Explore the Sun, Moon, planets, and the changing night sky. Discover moon phases, eclipses, meteor showers, and other celestial events that mark the rhythms of the year.
Curious Ways Our Ancestors Tracked the Seasons
Facts, Folklore, and Everything You Need to Know About the Fall Equinox
Milky Way Stargazing Guide: Best Time, Places, and Tips
When is the Winter Solstice, and What Is it All About?
Everything You Should Know About the Longest Day of the Year
Tips on how see Saturn at its closest point to Earth
Discover why dewpoint matters more than relative humidity for how muggy or comfortable the air really feels.
Planet Neptune: 10 Facts About the Other Blue Planet
A very good year for bright, frequent meteors thanks to an early‑setting crescent Moon
What people mean when they say “Blood Moon,” why the Moon sometimes looks red, and where the myths come from.
Uncover the story behind the Buck Moon and what makes July an important month in Moon lore.
Do Your Own Stonehenge Thing—Without Moving a Single Rock
It's Hot, Hot, Hot This Summer! See Average Temperatures for Your Region
Yes... It Gets Dark Earlier After the Solstice.
Uncover the stories, science, and symbolism behind the first Full Moon of summer in 2026.
From Europa to Titan: Exploring the Weirdest Moons in Space
Think You’re Standing Still? Think Again. Discover the Incredible Speeds at Which You're Spinning, Orbiting—and Why You Don’t Feel a Thing.
Learn Something New About the Longest Day of the Year!
Black Hole in star system we can see with naked eye
Mark Your Calendar for May 2026’s Full Moons!
What to Look for in the Night Sky for the Month of May
Don’t miss the Geminids—December’s top meteor shower with up to 75 shooting stars an hour!
Explore spring’s first Full Moon and the traditional names that celebrate the season’s return.
Types of Galaxies and How to Spot Them This Spring!
Fun Facts and Frequently Asked Questions About the March Equinox
Images on the Moon: The Man in the Moon and Other Legends
Learn what a New Moon looks like, why you can’t see it, and when the next New Moon will occur
Visible Planets, Bright Stars, and Constellations
March’s Full Worm Moon Comes With a Rare Lunar Eclipse
Authoritative definitions of the Sun, Moon, stars, and planets.
Good Luck, Bad Luck, and Moon Folklore
The same side of the Moon always faces Earth. So what's on the far side?
Interesting Facts About the Moon You Didn’t Learn in School
Watch for November's Full Beaver Supermoon!
Lunar Perigee and Apogee and the Moon's Orbit
How Carbon Dioxide Shaped Earth, Mars, and Venus
Feast Your Eyes on the Harvest Moon!
Why December’s Full Moon is a Supermoon and Called the Cold Moon
After the Shortest Day of the Year, Get Ready for Sunlight!
2026 Skywatching Guide to the Best Moons, Planets & Meteor Showers in the Night Sky
Discover why Regulus has fascinated astronomers for thousands of years, from ancient royal symbolism to rare planetary encounters.
What's happening in the night sky in February?
Explore ancient Moon superstitions and dream meanings—from omens of luck and love to eerie warnings written in the night sky.
Tide Terminology Explained: A Guide to Tides and Tidal Ranges
When Is the Next Leonid Meteor Storm?
Discover Why February’s Moon is Called the Snow Moon and How to See It at Its Peak
Discover why stars twinkle, why planets usually don’t, and what atmospheric conditions make the night sky shimmer.
Does the Moon Affect the Weather? A Historic Almanac Chart Explained
When Earth is Closest and Farthest from the Sun in 2026
Celebrating Natural Symbols of the Winter Solstice
What causes tides on Earth and more facts
Why the Earliest Sunset of the Year is NOT on the Solstice
The Search for Exoplanets and Extraterrestrial Life
Brightest Stars and Constellations of the Night Sky
