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.

Mark Your Calendar for May 2026’s Full Moons!

Welcome to Your Stargazer’s Toolkit

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!

The frequency and rarity of a total solar eclipse

Shine On, Harvest Moon! Facts and Folklore

Black Hole in star system we can see with naked eye

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

Tonight's Night Sky During the Month of June

Catch Venus, Jupiter, Uranus, and Saturn—plus peak meteor showers this November!

What planets and stars can we see tonight?

Tonight's Night Sky for the Month of September

July 2025 Guide to the Bright Planets and Stars

March’s Full Worm Moon Comes With a Rare Lunar Eclipse

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

Authoritative definitions of the Sun, Moon, stars, and planets.

What people mean when they say “Blood Moon,” why the Moon sometimes looks red, and where the myths come from.

When Is the Next Solar or Lunar Eclipse?

The Origins of the 5 Ocean Names

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

Lunar Perigee and Apogee and the Moon's Orbit

Uncover the story behind the Buck Moon and what makes July an important month in Moon lore.

Why December’s Full Moon is a Supermoon and Called the Cold Moon

How Carbon Dioxide Shaped Earth, Mars, and Venus

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.

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

Explore ancient Moon superstitions and dream meanings—from omens of luck and love to eerie warnings written in the night sky.

Look for the Dog Star this month!

Tide Terminology Explained: A Guide to Tides and Tidal Ranges

This bizarre day is full of amazing sky-related stuff

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.

A very good year for bright, frequent meteors thanks to an early‑setting crescent Moon

Does the Moon Affect the Weather? A Historic Almanac Chart Explained

Find Out When to See a Supermoon in 2026

A Guide to Traditional Full Moon Names and Their Meanings

When Earth is Closest and Farthest from the Sun in 2026

Spot the "Dog Star" on New Year's Eve!

What Was the "Christmas Star"? When Can You See It?

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

Uncover the stories, science, and symbolism behind the first Full Moon of summer in 2026.

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

Stargazing in the February Night Sky

Free March Sky Map (Star Chart)

Free August Sky Map (Star Chart)

Free May Sky Map (Star Chart)

Everything you need to know to spot December’s top sky‑watching moments — no telescope required.

Where is Orion in the winter sky?

How Many Moons Does Jupiter Have? Amazing Facts About the King of Planets

All about Mercury, the planet closest to the Sun

Everything you need to know from a veteran eclipse chaser

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

A Few Steps to Discovering a Space Rock!

Weird but True: Fascinating Universe Facts You Probably Didn’t Know

Compass-Free Navigation: Survival Tips for Hiking & Camping

Epsilon Lyrae is not just a binary star, but a double binary star.

Betelgeuse Star: Facts, Viewing Tips & Supernova Potential

From dazzling planets to shooting stars, here’s your guide to October’s must-see celestial events.

Do Your Own Stonehenge Thing -- Without Moving a Single Rock

Milky Way Stargazing Guide: Best Time, Places, and Tips