Difference between meteoroids, meteors, meteorites and comets
By: Bridget Webber
Understanding the difference between meteoroids, meteors, meteorites and comets can be difficult, especially as the first three sound so similar. They are in fact linked, via their life cycle, and also by the Greek translation of the word Meteron, which means a phenomenon in the...
Difference between meteoroids, meteors, meteorites and comets
By: Tamara Haddock
Meteoroids, meteorites, and meteors, are all variants of meteoroids. A meteoroid is a piece of space debris that is smaller than an asteroid. Meteoroids tend to be between the size of a grain of sand, and a boulder. They are composed of either stone, or...
By: John Traveler
In 1924, American astronomer Edwin Hubble discovered a Cepheid star—a pulsating or variable luminosity star— in the Andromeda nebula. Until then the Andromeda nebula was believed to be a cluster of stars and dust within the Milky Way. Indeed, the Milky Way was then...
How galaxies are formed
By: Laura LeFae
Galaxies have been viewed as the building blocks of our universe since the 1930s. Before that time, galaxies were a subject open to speculation. Wonder at the universe has always provoked theories about how our universe and the galaxies it held came to be. Understanding...
The difference between globular clusters and open clusters
By: Eileen Eva
If you are an astronomer or a person who enjoys watching stars and constellations, you must have come across the words globular and open clusters. According to NASA, “Star clusters are groups of stars which are close together in space, rather than just accidentally...
By: Bruce Tyson
People do it everywhere else, so why not in space? The modern fascination with sex may no longer escape NASA’s public policy as calls emerge for the agency to define proper etiquette for “getting it on” in a weightless environment. Also the &ldquo...
By: Robert Tesla
Throughout the universe, things are in constant flux. Stars are formed and galaxies are consumed, and no one would ever notice if not for the many advances in astronomy. In the early days of travel, being able to decode the stars was a necessity to...
By: Patrick Stephen Baker
Abu Ali al-asan ibn al-asan ibn al-Haytham, generally called Al-Hazen in Europe is known in the West as “Ptolemaeus Secundus” or “Ptolemy the Second” based on his main astronomical work Al-Shukuk ala Batlamyus, generally translated as “Doubts Concerning Ptolemy”. He also wrote...
By: Terrence Aym
World famous science fiction writer and futurist, the late Sir Arthur C. Clarke once penned a novel, "The Fountains of Paradise" that featured an amazing technology called an orbital tower that's basically an elevator to space.According to A. Senthil Kumar, deputy head at the...
By: Norman Green
A sunspot is a visibly darker area, appearing in the photosphere of the sun. They are a temporary phenomena, each individual sunspot having a longevity that can vary from a few hours to a couple of months. The spots appear darker than the rest of...

 

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