Tag Archives: astronomy

Blog #4

Composition -The solar system is primarily composed of the Sun, which makes up about 99.8% of its total mass. The Sun is primarily composed of 74% hydrogen and about 24% helium with some amounts of heavier elements. Planets in our solar system are divided into two main groups based on their composition: the terrestrial planets […] Continue reading

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Blog Post #3

The solar system began to form from a giant molecular cloud of gas and dust particles about 4.6 billion years ago. This cloud most likely experienced a shock wave from a nearby supernova, which could have made it collapse under its own gravity. It then began to spin and flatten into a disk shape due […] Continue reading

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Why Stars?

Throughout history, many civilizations have been fascinated by the stars in the night sky. But the question is why. Why have many civilizations been fascinated by stars? What makes the night sky so attractive to humans? Why did they ascribe meaning to tiny dots that shone brightly, and seemed so far away? I present the […] Continue reading

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The Journey Back to the Moon

Hello everyone! Almost spring break! Isn’t it bonkers to think that we first sent human beings to the Moon in 1969? That’s 54 years ago! In that time, we have made such large strides in technology. Finally, there are plans to go back soon! NASA is working hard on its Artemis campaign. This campaign aims […] Continue reading

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The Cosmic Spin-off That Created Our Solar System

Alright, let’s dive into how our solar system came to be, and trust me, it’s quite the cosmic tale. Picture this: over 4.5 billion years ago, the universe decides it’s time for a little creation project. So, in a neighborhood of our Milky Way galaxy, a giant cloud of gas and dust, known as a […] Continue reading

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The New Wave

In a groundbreaking discovery, scientists have found evidence of ripples in the fabric of the universe, caused by the movement of colossal black holes. Albert Einstein once hypothesized this phenomenon –  gravitational waves. Essentially, these are cosmic tremors that stretch and squeeze space itself. Imagine throwing a stone into a pond and watching the ripples […] Continue reading

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Kepler’s Laws of Planetary Motion

After meticulously calculating the data that Tycho Brahe collected, Kepler discovered three different laws that described how planets move. Kepler’s First Law – The planets orbit in ellipses, not circles nor epicycles. For majority of history, it was thought that planets orbit through epicycles because the orbit of the planets must be perfect. However, the […] Continue reading

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The Banner of Heaven

This term, originally coined in the late nineteenth century, at least with its current connotation, began to speak to me in a unique way in high school. I took a backpacking trip in Northern California, and experienced a dry, warm, cloudless night with no shelter but a mosquito net. The sky was brilliant, and it felt like […] Continue reading

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Justin's Blog 2024-02-12 17:22:51

History of Astronomy in Korea! Hey everyone ! Do you guys remember when we were learning about historical astronomical sites in class? I remember one of the sites catching my eye because it looked incredibly familiar. It was the one in Korea called Cheonseongdae in Gyeongju, South Korea. I once visited this while on a […] Continue reading

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Historical Astronomers in Context

Historical Figures Nicolaus Copernicus was born on February 19, 1473, and died on May 24, 1543.  Johannes Kepler was born on December 27, 1571, and died on November 15, 1630.  Tycho Brahe was born on December 14, 1546, and died on October 24, 1601.  Galileo Galilei was born on February 15, 1564, and died on […] Continue reading

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