# Edmund Halley

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The History of Compounding & Compound Interest

In this episode of Saturday Morning Muse, Andy explores the concept of compound interest, discussing its historical significance and mathematical foundations. He introduces Benjamin Franklin's experiment with compounding, the contributions of mathematicians like Edmund Halley and Leonhard Euler, an…

265. Was a Comet the Star of Bethlehem?

A bright, icy, small Solar System body passes by Earth and is observed around the world every 76 years. Its tail is over 96 million miles long of dust and gas blown out from the coma surrounding its nucleus. British scientist Edmund Halley's calculations predicted the comet would return, and it did…

Syzygy and Selenelion

I learned a new word when I was reading the news this morning. Selenelion. Apparently, on Tuesday morning we may be able to see the fully-eclipsed moon and the sun at the same time, which is called a selenelion. The eclipsed moon is also called a blood moon, because when it ducks behind the shadow …

When Astronomers See UFOs

There is a misconception in the field of ufology that no astronomers have seen UFOs. But the truth is exactly the opposite. In fact, there is a long list of high-profile astronomers who have had incredible UFO sightings. In 1952, Blue Book astronomy expert, J. Allen Hynek held a conference with ast…

Hollow Earth: Are We the Inside People?

Could the Earth actually be hollow, or is Hollow Earth one of the strangest conspiracy theories ever created? In this episode of Between the States, Dan, Noel, and Jared dive into the wild world of the Hollow Earth theory, from ancient myths about underground civilizations to Edmund Halley’s early …

Isaac Newton's Principia

On July 5, 1686, Samuel Pepys, in his role as President of the Royal Society, signed the official authorization to print Isaac Newton's Mathematical Principles of Natural Philosophy. Behind that signature lay years of silence, a furious priority dispute with Robert Hooke, and a financial crisis tha…

Edmund Halley & His Comet

How did our understanding of the universe begin in a London coffee house? How did a man who had a comet named after him change science forever? From his youthful voyage to St Helena to chart the southern skies, to his pioneering studies of navigation, longitude, gravity, and the Earth’s atmosphere,…

August 26: The Great Comet

Edmund Halley was an English astronomer, mathematician, and physicist. In 1720, he was named the second Astronomer Royal. He produced a map of the stars in the southern sky and received many awards and accolades. On this date in 1682, he made the finding for which he is still remembered today. It w…

Week 34: Edmund Halley Observes His Comet

This week in history we’ve got an ancient volcanic eruption, we’ve got a prime minister being devoured, we’ve got a mysterious gas cloud killing thousands - and we’ve got Edmund Halley discovering something important about the famous comet that still bears his name today. The Most Interesting Peopl…

What Did Kepler Teach Us About the Number of Planets in the Galaxy? - Reading the Shadows of Distant Worlds | Sleepy Facts About the Universe

We have spent centuries learning to read shadows, but it is only recently that we have learned to read the ones that dim stars a thousand light-years away. When a planet crosses the face of its host star, it creates a whisper of darkness, a drop in brightness smaller than a candle's flutter seen fr…