A Blog of the Solar System 2020-01-15 00:08:09

https://www.google.com

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Blog Post 0

I am going to post a picture of myself for a picture that represents me (view it below)

Here is a hyperlink to my Instagram account (sorry, it’s private. You’ll have to follow me if you want to see my photos. I promise I’m interesting).

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Self-Introduction

Hi! My name is Xingbei Cao, a sophomore Computer Science student at Vanderbilt University. I got interested in Astronomy due to the movie Contact, in which the beautiful cosmos and Dr.Arroway’s interactions with the aliens really impressed me.

A beautiful galaxy from the view of Vega

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Earth’s Movements 101

A layman’s guide to the motion of the Earth

We’re all just stardust. Literally…

— Me.

The motion of the Earth can be a complex concept to wrap your mind around. Why? Because Earth isn’t only moving in one way. Let’s start with the most simple and easy-to-understand of Earth’s motions- rotation. Earth is spinning constantly on its axis. In fact, it is spinning at a speed of approximately 1,000 miles per hour. Pretty fast, huh? This is the origin of day and night. Imagine being a stationary point on a rotating ball with a light source in front of you. At certain points in this rotation, you are directly facing the light source and receiving maximum exposure. As the ball continues to spin, the light source is now at an angle and a little less bright. Continuing on, you will eventually reach a point where you are completely facing away from the light source. You are stationed on the shadow side of the ball. This is night. For Earth, the transition from day, to night, and back to day happens in a period of 24 hours.

Next, the Earth is tilted on its axis. This tilt of 23.5 degrees is the reasons that we have seasons (we’ll get into that more later on). The tilt of Earth’s axis also moves in a circular motion. This, however, takes thousands and thousands of years to form a complete circle so, this motion is fairly irrelevant over the span of a human lifetime.

Finally, the Earth orbits, or rotates, around the sun. This is not done in a perfectly circular shape but is instead, an elliptical with the sun closer to one end. As the Earth reaches the side of the elliptical closer to the Sun, it begins to rotate faster and as it ventures farther from the Sun, its orbit slows. One full orbit around the Sun is considered to be one calendar year or 365 days. Because the Earth is tilted on its axis, on one side of the orbit, the top part of Earth is naturally tilted away from the sun, and on the other side of its solar orbit, the top half of Earth is tilted toward the sun. This tilt has a large effect on the temperatures we feel here on Earth.

All of the above motions are demonstrated in the below picture.

Earth’s motions

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Stargazing in the Home State

Most people I have met have never seen the Milky Way with their naked eye. In fact, a lot of people I have met did not know this was even possible! Luckily, I live in the state of Utah, where 80% of the population lives within a stretch of towns and cities called the Wasatch Front. This leaves a large area dedicated to state and national parks untouched by light pollution. Southern Utah, particularly Bryce Canyon National Park and Arches National Park allow you to see the beauty of space with no telescope required, and I cannot wait to visit again.

Arches National Park at night, courtesy of
Arches National Park at night. The picture can be found here

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I love physics

Source: (Toppr)

Hello and welcome to my blog! I hope to fill this website with interesting topics about physics and astronomy. My name is Khalil Greene and I am a student at Vanderbilt University. My major is physics and I plan to minor in astronomy so that I can go to graduate school and become an astrophysicist. Ever since I was a small child, I have been fascinated with space and science in general. Two people in particular have been a big influence in my decision to be an astrophysicist. These people are Neil deGrasse Tyson and Carl Sagan. I have watched both of their “Cosmos” series and can’t wait to watch season two of Tyson’s series in March of 2020.

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Blog 0 – Starting Up

By me
TESS “First Light”

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My First Post, ASTR 2110

Me playing soccer at age 9, taken by my father

I’m from Santa Barbara, which is a totally rad city you can learn more about by checking out the city’s website here.

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Why I Chose Astronomy

This is one of many pictures of the “Multiverse.” The multiverse is a theory that our universe is just one of many universes. It gives insight to how little is truly known about the universe, and what other possibilities there could be left to discover. This image was uploaded from https://www.smithsonianmag.com/science-nature/can-physicists-ever-prove-multiverse-real-180958813/.

From the beginning of astronomical studies, it was always assumed that people, that Earth, is the center and the largest and most important of everything out there. While these basic assertions have been debunked over the past few centuries, it is only recently that this foundational way of thinking, in which we are the only beings and solar system is the only solar system and our universe the, only universe has begun to change.

This is realized through theories from aliens and life beyond our planet to the idea of a “multiverse.” The multiverse, shown in the provided picture, is defined as “innumerable regions of disconnected space-time.” To put in lay-mans terms, this theory states that there are an infinite and increasing number of universes. Each of these universes contain it’s own cohort of astronomical objects, yet different laws of physics. This vastly increasing and never-ending amount of universes is created from eternal chaotic inflation which is based upon the theory of cosmic inflation and how cosmic inflation “does not end everywhere at the same time.” This non-uniform inflation leads to multiple pocket universes that go on without an actual end. (Kunn) To look further into the idea of multiverses and parallel universes, you can find a plethora of information at https://space.mit.edu/home/tegmark/multiverse.pdf.

But how does this relate to why I personally want to study astronomy? Think about how small we are relative to our plant. Now our solar system. Now think about us in relation to our galaxy, our super cluster, our universe! We are beyond tiny; we are not even microscopic in comparison to our universe. So how much smaller would we be in comparison to a multiverse? This way of thinking allows me to put the aspects of my daily life into perspective, and liberates me from these stresses. So maybe I don’t get the best score on an exam (not that I don’t care about my classes, because I do!). When I think about how little I am, and that one test is, relative to everything else that is and could be, I am liberated from this small stress. This only makes me want to study astronomy more and understand just how important I and all that our planet has to offer truly is.

Kuhn, Robert Lawrence. “Confronting the Multiverse: What ‘Infinite Universes’ Would Mean.” Space.com, Space, 23 Dec. 2015, http://www.space.com/31465-is-our-universe-just-one-of-many-in-a-multiverse.html.

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Introductory Post

Welcome to my ASTR 2110 blog. This is my introductory post. I have attached a photo of an exploding star, which was taken by the Hubble spacecraft. You can read more about this image and how it was taken here.

Exploding star, captured by Hubble. Space.com.

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