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Astronomy
Seasons Articles
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First Day of Spring 2021: The Spring Equinox
In 2021, the spring equinox occurs on Saturday, March 20. This event marks the astronomical first...
When Do the Seasons Start in 2021?
When do all of the four seasons—spring, summer, fall, and winter—start and end? Find your equinox...
Winter Solstice 2020: The First Day of Winter
The winter solstice happens on Monday, December 21, 2020. This is the astronomical first day of...
What Are Perihelion and Aphelion?
Earth reaches its closest approach to the Sun for the year 2021 on January 2. We call this point in...
Fall Foliage: Be Prepared for Peak Foliage
Have the leaves start changing in your area? When will they peak? Find tips for spotting peak...
Midsummer Day 2020: Why (and How) is Midsummer Celebrated?
Are you familiar with Midsummer Day (traditionally June 24)? Here’s why it is called “Midsummer,”...
Vernal Equinox Oddities
On the spring equinox, does the Sun rise due east and set due west? Are day and night equal? Bob...
Groundhog Day and Shadow Fun
Groundhog Day. Just a bizarre tradition involving rodents? Or, rather, marmots? Actually, Groundhog...
Why February Is Cold
Our coldest months are December, January, and February in North America. Someone recently asked me...
A Better Way to Visualize the Seasons
We’ve grown up with four seasons. But they don’t always match what we experience. What about...
Summer Solstice Full Moon in June!
On June 20, 2016, the Full Moon appears on the same night as the summer solstice! It’s rare, all ...