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How Does the Solar Cycle Affect Weather?
Here at the Almanac, we have long believed that the Sun’s weather cycles—called “solar cycles” or “...
How Fast Does the Sun Move?
Does the Sun spin? Yes, very slowly! Does the Sun orbit anything? Yes, it does! Find out facts...
How to Safely Watch a Total Solar Eclipse
You can seriously damage your eyes by watching a solar eclipse without proper protection (NOT...
Solar Eclipse Safety: How to Protect Your Eyes
Both total solar eclipses AND partial solar eclipses require specialized eye protection. I’ve...
Summer Solstice 2019: The First Day of Summer
The June solstice 2019—the summer solstice in the Northern Hemisphere—will occur on June 21. Here’s...
First Day of Spring 2019: The Spring Equinox
In 2019, spring equinox (also called the March equinox or vernal equinox) falls on Wednesday, March...
What Are the Northern Lights?
The aurora borealis (or northern lights) is one of nature’s most dazzling events. Shimmering...
What are Perihelion and Aphelion?
The Earth is closest to the Sun—or, at the perihelion—about 2 weeks after the December Solstice ...
The Influence of Solar Activity on Weather
What is the influence of solar activity on the weather? Dr. Richard Head, a former weather...
Next Total Solar Eclipse
When is the next total solar eclipse? See our dates when the total eclipse of the Sun is visible...
What Are Sunspots?
The Old Farmer’s Almanac uses sunspot activity to help in making its weather predictions. What are...
Groundhog Day and Shadow Fun
Groundhog Day. Just a bizarre tradition involving rodents? Or, rather, marmots? Actually, Groundhog...
The Autumnal Equinox
Coming up next week is the Blood Moon. Also called the MegaMoon. Or, the Mega Harvest Moon. Or, the...
The Sun is Flipping Out!
Look up! You can see the biggest somersault in the solar system. The sun is in the middle of a...
The Sun Always Shines at Noon
Have you ever noticed that on an overcast day the sun will often break through the clouds close to ...
The Eight Layers of the Sun
The Sun is Hotter Than Hot! The Sun's temperature varies over time and throughout these seven...
The Gravitational Pull of the Sun
The Sun Has a Lot of Pull! The Sun makes up more than 99 percent of the total mass of the solar...
How Much Energy Does the Sun Produce?
The Sun Is a Huge Ball of Energy The Sun is about 865,000 miles in diameter. That's as wide as...
What is the Sun Made of?
What's the Sun made of? It's not solid. The Sun is composed of plasma, a material made from...
How Old is the Sun?
The Sun is one of 100 billion stars in our Milky Way galaxy. Scientists estimate that the Sun is...