Solar astronomy in the prehistoric southwest United States
By: Sheri Fresonke Harper
According to Dr. J. McKim Malville in a Guide to Prehistoric Astronomy in the Southwest, the use of natural features in the landscape augmented by man-made structures and pictographs provided essential astronomical data about the sun to the Puebloan cultures. More speculative in natural are...
By: Tenebris
A sunspot is an irregular and temporary area on the sun's visible surface which appears dark against the yellow of the sun. Although they seem small in comparison to the sun, the average sunspot is twice the size of our earth. At the other end...
By: Tenebris
Solar astronomy is the scientific study of the star nearest us, our sun. The word 'solar' comes from the Latin word 'solaris'/'sol' ('sun'), and the word 'astronomy' comes from the Greek 'astron' (star) and 'nomos' (law). As nearly as we can tell, our sun appears...
By: Sheri Fresonke Harper
With nearly eighteen centuries of naked eye observations of sunspot activities, scientists have a treasure trove of information about solar activity. The first person to realize that collating multiple sources of historical information about solar sunspot activity could yield results was astronomer Rudolf Wolf who...
By: Woody Woodhouse
A sunspot is defined as a cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic field. Sunspots have been appearing on the sun for as long as astronomers can remember however; it wasn't until late 2002 when the most detailed...
What does a lunar eclipse look like from the Moon?
By: Jeffrey Graf
A lunar eclipse occurs when the Earth passes between the sun and the moon. As viewed from the earth, we see the Earth's shadow pass across the Moon. As viewed from the moon, we would see the sun go dark during the day, much like...
The development of sunspots and sunspot groups
By: Alexander Darracott
To obtain a complete picture of how Sunspots develop, it's important to understand the Sun itself: how heat is generated and transported through the Sun's different layers, its rotation, its magnetic field and its surface.The Sun is a huge, immensely hot circular concentration of...
By: Perry McCarney
Since the dawn of civilization and long before, night falling in the middle of the day, darkness seeming to eat the sun, has induced terror. People like a certain amount of stability in their day to day lives, we always have, and nothing is...
Force: Concept explained
By: Jacob Myers
Force, Work, and Power Equations in Physics In the field of physics there lies a multitude of equations that once solved can unlock the secrets of the universe. One might think these equations extremely complex and hard to comprehend, but in all reality once broken...
Dyson Spheres - science-fiction or science-fact?
By: Sarah Townson
Dyson Spheres and the Search for Extraterrestrial IntelligenceImagine a future Earth where the population has grown so huge that there simply isn't enough energy to go around. Not even enough to boil a kettle. Writing in 'Science' in 1960, the physicist Freeman Dyson looked at...

 

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