Happy Thought for 17 March 2023

Have a Happy Thought: 

You know how the really big, shiny things in the sky are (mostly) stars?

And the biggest things that orbit those stars are (mostly) planets? (sorry, Pluto!)

And the biggest things that orbit those planets are moons?

 What happens if there’s something orbiting a moon? What do we call that?

 The answer is….

 Moon Moons. (sometimes written moonmoon)

I’m not even kidding, that is the official wording used by astronomers!

Ok, sometimes they call them submoons. Or subsatellites.

I know which one I prefer.


If you want the short version explanation about these, you can watch this video from an astronomer, reading a poem he wrote about the paper he wrote with another astronomer, defining moonmoons and when they could exist. The long version explanation is... reading the paper he wrote (linked in the video description)

 

No pictures for you, this week, since there are no moonmoons known, yet.

         Only Callista (moon of Jupiter), Titan (moon of Saturn), or Iapaeteus (another moon of Saturn) would be capable of having moonmoons – at least, in our solar system.

         We have yet to find evidence of moonmoons around other stars. But there are possibilities! And, given the extent of the universe, as being shown to us by the JWST, those possibilities are nearly endless.

Comments

Post a Comment

Thank you, we love reading your comments!

Popular posts from this blog

Happy Thought for 30 June 2023

Image
Have a Happy Thought:     At the end of this week, possibly as you are reading this email, you get to have some separation between work colleagues and home life. (If you’re retired… well, I’m already jealous, so don’t @ me with a “ what is a week-end ” sort of quote).   But four very lucky people (yes, I’m somehow jealous of them as well), this week began a 378-day “week”, being shut in with their colleagues.   June 25 2023 was the start of the CHAPEA Mission 1 - a simulated Mars habitat at NASA's Johnson Space Centre. For just over one year, these four people will live as if they were on Mars, giving us valuable insights into logistics and human psychology. You can watch the emotional press-conference / shutting-the-door-behind-them , it’s actually very cute! Mission patch for Chapea-1 https://www.nasa.gov/chapea/mission1  with the mission motto Ad Martus A Domo and the participants' names Selariu, Haston, Jones and Brockwell.   Of course, this is far from
Read more

Happy Thought for 23 June 2023

Image
Have a Happy Thought:     The new James Webb Space Telescope (JWST) is opening up the origins of the universe and very distant galaxies, stars and exoplanets to our understanding.   You’d think we’re only looking that far because we’ve figured out how everything works closer to us, right?   Wrong! Science is great because there’s always something new to explore and figure out. Here are just a few of the mysteries that remain for us to solve, or maybe just a few things you didn’t know, right here in our own solar system:   Q: What is our sun’s surface actually made of? A: We’re… not 100% sure, actually! We know mostly, by analysing the light that comes from the sun. You see, every time light passes through an object, including a bunch of gas, it changes the spectrum that we see – that object, or gas, absorbs some of the energy of light at specific wavelengths (or sometimes absorbs-and-re-emits-at-slightly-different-wavelengths). So astronomers can tell what gasses a sta
Read more

Happy Thought for 26 January 2024

Image
Have a Happy Thought: While some of our holiday breaks may be fresh in mind, others may be distant memories. Either way, I hope you’re entering 2024 with at least some positive energy. One way to hold on to that (or maybe create it if that’s what you need) may be to introduce frequent, but short, breaks into your day, ideally getting out into some blue- or green-space.   Image: A stump next to a tree-shaded pathway has had googly-eyes drawn onto it so it looks like a startled face. Picture by author. In fact, taking mini-breaks might benefit your physical health as much as your mental health! A recent study out of Columbia University in the US has found that taking frequent-but-short breaks, 5 minutes out of every 30, can have really impressive impacts on physical and mental health like: Blood sugar Insulin Blood pressure Mood Fatigue Cognitive ability  (apparently, I need this a bit, it took me three tries and spell-checker to spell cogni
Read more