I often get asks about blogs to follow, so here is a master post of where I find most of my reblogs. I will likely edit this post as time goes on so it will be permanently linked in the FAQ. Not all blogs are entirely astronomy-centric.
Dedicating this blog’s 1000th post to Carl, my biggest inspiration. He was the one who taught me that science is a balancing act between wonder and skepticism. It is an elegant language that unites all intelligent beings. He was the one who taught me that within this incomprehensibly vast universe, we are all connected.
So here’s to you Carl–Hey There, Universe, a love letter to the cosmos, via the binary strings of 1’s and 0’s, words and jpegs, and all the musings in between.
This Week’s Book Recommendation | Contactby Carl Sagan
Amazon’s review: “In December, 1999, a multinational team journeys out to the stars, to the most awesome encounter in human history. Who – or what – is out there? In Cosmos, Carl Sagan explained the universe. In Contact, he predicts its future – and our own.”
My review: “What would you imagine our first time making contact with an extraterrestrial intelligence be like? What would we say? How would we approach them? What is it about humans that make us so curious as to what really is out there? This book was nothing short of the most humbling adventure, across space, time and humanity—it felt profound. It was like Carl put us into this kaleidoscopic view of the universe and made us question who we truly are.”
Amazon’s Review: "One of the world’s most beloved writers and bestselling author of One Summer takes his ultimate journey—into the most intriguing and intractable questions that science seeks to answer.“
My Review: "From the Big Bang to life, from the earth to the heavens, from the night sky to what’s beyond– A Short History of Nearly Everything takes you on a vast journey of scientific discovery, starting from the very history of mankind itself to the interwoven path of scientific discourse– the search for truth and what it took for us to reach the understanding of the world around us today. It’s funny, and humble, and delightful, and expressive for people of all ages, expertise, or experience.”
This is an incredibly strange question. Hmm. The notion that the human body is a depiction of the universe is right—on a grander scale, humans are essentially a collection of atoms that are part of the universe and have manifested into beings with consciousness (this is a whole other study in itself—neuroscience, cognition, etc, etc).
The thing about “cures” for the human body is different though. We get sick because our biological order has to fight the entropy of the universe. No matter what sentient life forms exist, the battle is always with the idea that energy becomes more disorganized. In our world, on the Earth that we live in, the human-centric, carbon-based, four-limbed chimpanzees that we are, death is inscribed as soon as we are born. Here are some pre-determined factors from the top of my head: free radicals, reactive chemistry, cancer, telomeres, and infections—these are the reasons why we age and get sick. It’s a physical problem.
But I don’t think we can look to the universe as a way of discovering cures. The universe has no business aligning itself with the human culture. We think that because we are a part of it that it has a responsibility or an answer to our growing problems. But we aren’t perfect creatures, nor do we have the privilege to be. We are just the lucky result of atomic configurations. There’s always give and takes, much like for a reaction, there’s always an opposite and equal reaction—if we want to live in a disordered universe, we must succumb to its reality.
The point is, we must look at ourselves to discover the cure for ourselves. The universe is there for us to ponder upon, to ask about our beginnings, and to find the transcendental truths or physical laws that may explain our thirst for knowledge. Sicknesses and disease is a separate thing. It’s a byproduct of reactions. And in order to combat it, we have to look at the reactions itself.
Hello! Yes, yes, definitely agree, mirrors are very Interesting. Here’s how they work:
When a ray of light travels and hits a surface, it bounces off in certain ways. (There is a law that dictates the type of behavior—that is called the law of reflection). You have angle of incidence and angle of reflection, which is basically saying that light itself is invisible until it bounces off something and hits your eye. When that happens, we detect the scattered light. This is called diffuse reflection.
The conventional mirrors that we use everyday is made up of a thin sheet of glass with a coat spray of aluminum, which is the reflecting material (from what I understand, its inherent properties do not absorb *much* light—and it is not “white” because it’s not chemically energetic). Okay, a mirror reflection is called specular reflection, which is when light comes from a single direction and the ray is reflected into a single outgoing direction (the angle of incidence equals the angle of reflection). When this happens , the light proprogates the image but changes the orientation.
Also! I found out that some of the light is actually absorbed by the material, but it doesn’t necessarily affect the reflection. It’s all dependent on the material behind the surface. (thicker glass might render different, larger image).
Aluminum reflects approximately ~90% of visible light. [Source]
My dear followers, I just wanted to share some exciting news with you!
I have been accepted to graduate school in Chicago! After much debating, I’ve decided to take this offer even though I still have 2 other schools to hear back from.
At the present moment, I will be pursuing a Ph.D. in Earth and Environmental Sciences, with (I hope) a focus on Geomicrobiology and Paleoenvironments . What’s cool is the type of research I will be involved in, as my professor is an organic geochemist who works with extreme microbial life using an organic chemistry approach, as well as changes in the environment due to the domination of ancient bacteria in Early Earth.
All this, of course, has applications to life in the universe. I’m hoping this road will lead me eventually to a project that tackles astrobiology directly, especially in search of microbial life in our neighborhood planets. Perhaps not during grad school, but maybe after :) –pending that NASA decides to up its game in space exploration, hehe.
I’m so freaking EXCITED. There’s quite a bit of traveling involved as we would have to do sample collection–so I’m looking at possible expeditions to Antarctica, mid-Atlantic Ocean voyages, and many hikes/trips to our backyard mountain ranges, caves, hot springs.
I mean, what better way to spend your early twenties than doing science in the most exotic places in the world?
I can only thank the many people who have supported me throughout the years. Topping the list, of course, my parents. My boss/mentor of my undergrad research at the FDA. And then the endless encouragements from friends and scientific peers. I will be mentioning all of them in my Ph.D. thesis.
And you guys! For sharing the same love I have for science and wonder.
The center of mass is the average location of an object with respect to its mass. The center of gravity is the average location of an object with respect to its mass times local g. Assuming that g is constant for every location in the object, the center of mass is at the same location as the center of gravity. If it isn’t, then the center of mass is slightly off of the center of gravity.
This example was taken from Yahoo answer: In the real world, the center of gravity will rarely be exactly in the center of mass. The Earth’s gravitational field follows the shape of the Earth, meaning it’s spherical. If you had a bar perpendicular to a line between the center of the Earth and the bar’s center of mass, the ends of the bar would be in a slightly weaker part of the Earth’s gravity field than the center of mass. That would place the center of gravity slightly higher than the center of mass.
Here, I drew a diagram. (Excuse the crappy photo and handwritting–I tried an auto scan app thing on the iPhone. Not sure if it’s working too well lol)