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How is GPS used in spaceflight?
science.howstuffworks.com/how-is-gps-used-in-spaceflight.htm
GPS is great, but it's kind of Earth-centric. If we have our hearts set on traveling to distant planets and faraway stars, then it's time to come up with a new navigation system. NASA, of course, has an idea.
Where did the moon come from?
science.howstuffworks.com/question777.htm
The origin of the moon is explained in this article. Learn about the origin of the moon.
Oh Chrismon Tree, Oh Chrismon Tree?
people.howstuffworks.com/culture-traditions/holidays-christmas/chrismon.htm
In 1957, a woman named Frances Kipps Spencer invented "Chrismons" to remind parishioners of the true meaning behind the Christian celebration of Christmas.
How Sunspots Work
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Sunspots are explained in this article. Learn about sunspots.
The Solar System: Planets and Formation Explained
science.howstuffworks.com/46010-solar-system-explained.htm
While we generally picture the sun and planets when thinking about our solar system, it also consists of comets, asteroids and hundreds of moons.
Pluto: Is It a Planet After All?
science.howstuffworks.com/pluto-is-it-planet-after-all.htm
Back in 2006, the International Astronomical Union decided to demote Pluto to the status of a dwarf planet. A historical study challenges that designation.
Is Ophiuchus the 13th Zodiac Sign?
Thousands of years ago, the Babylonians created the zodiac and dropped a constellation when it didn't quite fit into their schematic. Its name? Ophiuchus. Should it be part of our horoscope?
How Ninja Work
people.howstuffworks.com/ninja.htm
Get a load of this: ninja fact, ninja fiction, and some of the most clever, terrifying weapons used by the shadowy mercenaries of ancient Japan. Find out the true story of the ninja.
What's the Difference Between Twilight and Dusk?
science.howstuffworks.com/nature/climate-weather/atmospheric/twilight-dusk.htm
Dusk is a beautiful time of day. So is twilight. But when does one turn into the other? And did you know there were three versions of each?
What will the Earth look like in 50,000 years?
science.howstuffworks.com/life/evolution/earth-50000-years.htm
The Earth in 50,000 years will most likely be a very different place. Learn about the Earth in 50,000 years in this article.