Valentine's Day. Is it a romantic day or one invented by greeting card companies and sellers of luxury goods? It certainly isn't an astronomical holiday, but whatever your view of the day, you can enjoy this selection of cosmic valentines.
Astronomy April Fools
Mercury has a moon? The Jovian-Plutonian Gravitational Effect will give you a floating feeling? The Space Station has an alien visitor? Virgin Galactic has bought Pluto and has plans for getting it reinstated as a planet? Nope. These are a examples of April Fool hoaxes and jokes.
Autumn begins on the equinox, the day the Sun crosses the equator. The earliest known civilizations celebrated the equinoxes, and they're still celebrated in many places. One of the biggest autumn celebrations is the Chinese Moon Festival. A traditional Chinese garden has a moon-watching pavilion.
Christmas in the skies
Christmas is a special day with a magic of its own. A Christmas eclipse is a great treat and centuries ago a long-awaited comet finally showed up on Christmas day. On the other hand, imagine spending the holidays a quarter of a million miles from home, as the crew of Apollo 8 did.
Cosmic Father's Day
What sort of tie would you give a cosmic father? What would you feed him? Where might he find challenging mountaineering, make an astounding golf shot or get up an interstellar soccer game? How can you send a special man a genuinely galactic greeting? Here's how.
Cosmic Halloween Tour
Join me on a Halloween astronomical tour. See a cosmic witch and cosmic ghosts, spiders and snakes, and fiery skull. But have no fear. It's a virtual tour and all these objects are a very long way away.
Valentine's Day is no assurance that love is in the air. Hearts and flowers aren't guaranteed to come your way. You may or may not get one of the billion valentine cards that are sent each year. But heart shapes are everywhere and anyone can admire them. Here is a cosmic selection for everyone.
Cosmic White Christmas
If you're dreaming of a white Christmas, the cosmos may have something of interest. How about deep snow on one of Saturn's moons, a gigantic Christmas tree whose lights are baby stars, a snowman on an asteroid, or an Einstein ring?
Galactic Winter Games
Welcome to the Galactic Winter Games, a starry tribute to Earth's Winter Olympic Games. It's a tour of some really cool cosmic sights – as well as some hot ones, such as one of the biggest explosions in the Universe.
February second is Groundhog Day, a day that's a mystery to people outside North America. Even in the USA and Canada, it's more a bit of fun than a holiday. Yet however superficial it is now, it's the offshoot of traditions that began in Europe thousands of years ago.
Halloween falls midway between an equinox and a solstice. In the ancient Celtic world it was the new year's eve and start of winter - time to prepare for survival in the darkening days. But also a time when the boundary between our world and the otherworld weakened. Who knew what might cross it?
Mother's Day - an Astronomy Bouquet
Flowers from the florist are popular for Mother's Day. But for really stellar mothers, here is a cosmic floral tribute with links to some dazzling astronomical images.
You've made it through the winter and watched the food stores diminish. But the days are getting longer and green shoots are appearing. Spring is on the way. The festivals of the vernal equinox emphasize rebirth and renewal. In many cultures the equinox is also the New Year.
Summer Solstice - St John's Day
Each day for six months after the winter solstice, the Sun rises a bit higher in the sky. It reaches the maximum height at the summer solstice, the longest day. Evidence of rituals and festivals at the times of the solstices goes back thousands of years.
Thanksgiving in Space
Many foods are associated with a traditional American Thanksgiving dinner. But what do you suppose would be on the menu for Thanksgiving in space? Would you have to squeeze turkey paste out of a tube and get gelatin-covered dessert cubes? No. Food has improved since the early days of space flight.
What Was the Star of Bethlehem
The Star of Bethlehem is one of the loveliest symbols of Christmas. But what was it? Simply an inspired idea to emphasize the spiritual importance of the story? Or was it based on an actual astronomical happening?
When Does the New Year Begin
Imagine midnight on December 31 – fireworks, friendship and celebration greet a new year. But only if you follow the Gregorian calendar. In the past, a year often didn't start on January 1, and for nearly two billion people it still doesn't. So when does a new year begin?
For six months, each day has been shorter than the last, the Sun lower in the sky. Will it disappear altogether and leave the people bereft in the dark cold winter? The winter solstice is the shortest day of the year and is associated with more festivals than any other astronomical event.
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