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Tag Archives: Science
The Fermi Paradox
outer space The physicist Enrico Fermi once asked the question “Where is everyone?” on the topic of extra terrestial life. The Fermi Paradox comes from the idea that if the universe is so old and vast why haven’t we found clear evidence of life elsewhere in the universe. When this thought is taken further it […] Continue reading
Tardigrades and extraterrestrial life
I first saw a picture of a tardigrade when I was a child, and even then, I was fascinated. I prefer the more affectionate term “water bear”, and these cute little “micro-animals” are a classic example of just how resilient life can be. As we briefly discussed in class, tardigrades have survived exposure to outer […] Continue reading
Posted in Class, Moons, Science
Tagged astro2110, astrobiology, blog7, Class, extremophiles, Moons, Science
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Post 6
Many people may remember the last total solar eclipse that was visible from North America. It occurred on August 21, 2017. The next total solar eclipse that covers North America, and the only one for the next 20 years, will occur on April 8, 2024—almost one year from today. Total solar eclipses are a fascinating […] Continue reading
Post 4
Scientists often try to determine the age of various bodies in the solar system. The Earth and moon are around 4.5 billion years old, and the sun is around 4.6 billion years old. But how do scientists know this? And how confident are scientists in these ages? Scientists use radiometric dating to accurately date different […] Continue reading
Post 3
The sun produces energy via nuclear fusion—that is, it fuses two atoms into one, releasing a tremendous amount of energy in the process. The most common form of fusion in the sun is when hydrogen atoms are fused into helium—giving off energy in the process due to the lost mass. This is the most efficient […] Continue reading
nuclear fusion
Have you ever wondered why the sun shines? It’s a question that has inspired centuries of astronomers to come up with a wide variety of explanations. It was once thought that the sun shone because of chemical combustion, but we now know that there is nowhere near enough oxygen for that process to have sustained […] Continue reading
Post 2
Astronomy is a science. This means that in astronomy we make predictions, test hypotheses, and use findings to continuously build and refine our theories. Interestingly, astronomy was very likely the first science. Humans, ever since the ancient civilizations, have looked to the sky and pondered its mysteries. What use would such people have in astronomical […] Continue reading
Extremophiles in Space
Extremophiles are lifeforms that can survive in what we would consider extreme conditions, such as very hot, cold, acidic, or salty environments. Since the various worlds we have observed in the Solar System are vastly different from Earth, astrobiologists predict that if any lifeforms exist in these places, they would be extremophiles. In this post, […] Continue reading
blog post 05
In 2006, Pluto was taken off the list of planets, leaving our Solar System with just 8 planets. This demotion occurred 76 years after Pluto was initially added to the list of planets. This decision by the International Astronomical Union (IAU) defined what objects could be classified as a planet. An object needs to be […] Continue reading
Posted in Historical, Observables, Science
Tagged astro2110, blog5, Historical, Observables, planet, pluto, Science
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