Caoimhín's Content

Astronomical and Educational content, in English and Irish

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  • Spiral Galaxies: You’re in One and How we Know

    Today we are going to take another look at galaxies. We’ve looked at galaxies before, and you can take a look back through my archives for some examples, but thankfully they are a big topic, so there is plenty to talk about. We are going to be taking a look specifically at spiral galaxies like…

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  • Saghasanna Pláinéid nach bhfuil Againn: Iúpatar Te agus araile

    In a recent video, I discussed the differences between the gas giants like Jupiter and Saturn and the ice giants like Neptune and Uranus. These two types of planets both contrast with the rocky planets in our solar system. This gives us three types of planets, though the gas and ice giants are commonly lumped…

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  • A Look Ahead to the Sky in July

    As we approach the end of June, we’re going to take a look ahead to what’s coming in July. Of course, at the very beginning, the sky won’t look too different, but we will look through the whole month. We will still start at the beginning of the month and the beginning of the night,…

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  • Famous Star: Real Stars in Science Fiction

    In the last piece, we took a look at some stars that were famous for moving quickly. The only one visible to the naked eye, 61 Cygni, is pointed out a the start of this video as well. Even though it has some unique features, it isn’t particularly well know. Some stars are incredibly famous,…

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  • Fast Moving Stars: High Proper Motion

    As the title says, we are going to be looking at fast moving stars, specifically stars with high proper motion. This means stars that look like they’re moving quickly in our sky, the ones we can tell are moving fast. Usually, when we’re looking a the sky, we treat the stars as a fixed background,…

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  • Where you can See a Different Sky More Easily

    Today, for this issue or installment, I decided to take a look at the sky from a couple of different locations and compare the kind of view that you can get. This is something that I regularly do as the sky does look from different places. Often, my focus is on comparing dark skies to…

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  • The Dark Side, or Far Side, of the Moon and Sampling

    Today we are looking, once again, at the Moon. For a change, we are going to take a look mostly at the side of the Moon that we don’t normally get to see. The Chinese Space Agency, or the China National Space Administration, has recently landed a lander, Chang’e 6, on the Far Side of…

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  • Icy Moons: What, Where and Why do we Care?

    Recently, we took a look at the difference between the gas giants like Saturn and Jupiter and the ice giants like Neptune and Uranus. Today, we are going to look at something else icy: icy moons. We already passed by an icy moon in the ice giant video, Triton, Neptune’s largest moon. Triton is tough…

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  • Undiscovering the Planet Vulcan

    Today, we are mostly going to take a look at some mistakes. Mistakes from the past can leave behind little quirks and inconsistencies in things we use today, and catching mistakes is often a good thing. Realizing that we were wrong about something can help us prevent similar mistakes in the future. This is inspired…

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  • Ice Giants versus Gas Giants: A Closer Look at the Biggest Planets

    Every month or so, I usually make a video talking about a particular planet. beginning with several months ago, up Jupiter and Saturn in the past couple of months. Having looked at the gas giants, the ice giants are next. Before giving them a specific video, I though it would be nice to compare the…

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