Gaia discovers asteroids with moons!

[@jeffrey5961]

Interesting times. Thank Dr Lieu for keeping us up to date.🙂

[@SpaceMog]

My pleasure!

[@Bob_C34]

A wobble or oddly shaped 😋 pretty cool. Thanks Dr Maggie 🙌🏻

[@SpaceMog]

Thank you for watching :-)

[@BusstterNutt]

A great update as usual thank you very much.

[@SpaceMog]

Thanks for watching!

[@annexcelestial]

This is a beautiful video...thank you Dr Maggie!!! You are the best!!!

[@SpaceMog]

Glad you enjoyed it!

[@johnlewis8664]

Great video! I’d never really thought of asteroids having moons, so that’s something new I now know

[@SpaceMog]

Thank you John! Hope you're ok

[@johnlewis8664]

@SpaceMog all good thanks 😊

[@samedwards6683]

Thanks for the super interesting lecture. Your excitement is so catchy. I wish that I had 1/2 of your energy!

[@SpaceMog]

Glad you enjoyed it!

[@targetmann100ify]

I look up every night..🎑 Thats the beauty of our life and universe..Many questions and so little time 😽Thank you for the gaia update beauty girl space cat 🙂🙃🙂

[@SpaceMog]

You might see some shooting stars if you look towards jupiter tonight :-) Thanks for watching!

[@patrickb2862]

All dressed up I see. Thanks for the information. Very well done, as usual

[@SpaceMog]

Thanks for watching!

[@jeffreylarge8174]

Yet another awesome video Maggie. Thanks for the insight.

[@SpaceMog]

Thanks so much :-)

[@gabimatzeu9879]

Amazing and highly informative as usual Dr Lieu!

[@SpaceMog]

Glad it was helpful!

[@karlitoradskunk7816]

Great content. Also you look stunning in this video ❤

[@SpaceMog]

Glad you liked it!

[@Broken_robot1986]

Moon shirt! Love it! -Some would say that the earth is our moon, but that would belittle the name of our moon, which is the Moon.

[@SpaceMog]

Thanks

[@jeffmosesjr]

Awesome video! And you look amazing!

[@SpaceMog]

Thank you so much!!

[@SpacePioneer365]

Not only is GAIA mapping stars, but now it's even finding moons around asteroids-how cool is that? Thanks for always making such awesome and informative videos! 👏👏👏

[@NachtmahrNebenan]

Thank you, Meg! I love all the survey missions and telescopes 🔭 like Gaia, Euclid, Kepler (R.I.P.) and the upcoming Vera Rubin telescope! All the known unknowns and the unknown unknowns are discovering - what a time to be alive 🚀

[@SpaceMog]

Me too! It's so impressive what we can achieve these days! What's your favourite mission?

[@NachtmahrNebenan]

@@SpaceMog Euclid, because of the sheer scale it's looking at. But it's what people find out from the data no matter what experiment they are coming from.

[@kablamo9999]

Gaia is one of my favourite missions

[@MicrobiusBlue]

Thanks for another Mogtastic vid 😎

[@SpaceMog]

thank you! appreciate the comment :-)

[@DavidBrant]

Never met Herschel, thankfully.😅 Good to see ya, Prof! 🥰❤

[@SpaceMog]

What? You must meet him 😂

[@DavidBrant]

@@SpaceMog 🌚

[@grahamturner1290]

Sheer lunar sea. 😊

[@SpaceMog]

it wasn't a crater-strophic failure

[@grahamturner1290]

@@SpaceMog it certainly made an impact. 😊

[@Mike_Greentea]

👍👍👍

[@SpaceMog]

Thanks for the comment!

[@tigdogsbody]

What aren't we capable of? It's amazing. Thank you.

[@SpaceMog]

Thanks for watching 😊

[@lokarthaaeris6506]

let's get to asteroid mining

[@SpaceMog]

Yes please, when do we start?

[@lokarthaaeris6506]

@@SpaceMog gotta get the moon base up and running first

[@John-wd5cb]

Are you mad? There will be intergalactic war.

[@Allan_aka_RocKITEman]

​@@John-wd5cb>>> How does mining asteroids _in our own solar system_ initiate _intergalactic war?_

[@grrcat2235]

Thanks, i learned somethng new today

[@SpaceMog]

Glad to hear it!

[@Duckfisher0222]

Don't disturb it, it might loose his oceans! Thanks for the video, enjoyed it!

[@SpaceMog]

and all those life... 🪱 🌊

[@siwalder1618]

.. where a simple sneeze might put you on escape trajectory

[@SpaceMog]

😂 - the dream

[@NightmareFuelsYou]

New Space Mog video? I'm over the moon

[@SpaceMog]

🌝

[@BZAKether]

I would think that finding those natural satellites would be easier with the asteroids being closer than exoplanets! And I didn't expect that the most novel way to find them was by a similar method.

[@SpaceMog]

You would think we could just see everything right? But resolutions arent that great, we still haven't found planet X!

[@ChrisM-hx9kv]

Commenting to feed the algorithm 🙃

[@SpaceMog]

thanks!

[@jasongarcia2140]

The cutest space cat if I may be so bold as to say. I never say stuff like that so I hope I'm not creepy!

[@SpaceMog]

not at all! Thank you 😊

[@SpaceMogLuna]

352 new asteroids. How and/or when will these be analyzed to determine if any are a threat to Earth? Is that a useful AI application? You had a lovely trip to Korea.🥰 Maybe do a video about it.🌠 Always love your fashion sense.💖

[@SpaceMog]

They did some nice analysis on them in the paper linked, and more to come from them I'm sure. In the paper, they assume a binary model to fit the astrometry signals so AI would be a good alternative to quickly get through the 150,000 data and not assume a model form... Korea was great but not enough content to make a video - maybe next time :-) Btw, I've missed you, while you've gone... is everything going ok with you?

[@MrMakulit1959]

i love that you called it a ball of cheese. (that natural satellite of earth famous in song and story)

[@SpaceMog]

i wont believe it's not until you send me there and i see for myself 😊

[@adamc1966]

You look beautiful today and I love your videos 👍

[@SpaceMog]

Aww thank you so much :-)

[@theunknownunknowns256]

I guess next step is to ascertain if the astroid moons are made from the astroid or captured by the astroid. I feel like this is the type of fundamental science that doesn't seem useful but will reveal something profound.

[@SpaceMog]

That would be cool, if made from the asteroid it would suggest a collision event and being able to constrain the frequency of such events would be really insightful - great comment, thanks!

[@flakcannon722]

Surprised you don't have more subs, keep it up... The evil algorithm will notice you eventually

[@SpaceMog]

All I need is you :-)

[@HarryNicNicholas]

i would really like to know more about how spacecraft trajectories are calculated, it all seems so matter of fact these days with rockets going up almost daily, but it's still a mystery to me how you "aim" a rocket at liftoff, then keep it on track for say, a planet fly by, and how you calculate a spot on the moon when there is no GPS there yet....i'm an animator and i've built various models of spacecraft, telescopes (for ESA) and solar systems (i worked on the 1999 BBC series "the planets") so i've "flown around the solar system" a few times, and even in virtual worlds it's tricky, but would love to know how it's done for real.

[@SpaceMog]

Have you played Kerbal Space Program? We did orbit calculations on my uni course - the Hohmann transfer orbit I remember the most - may make a video on it soon. Thanks!

[@Allan_aka_RocKITEman]

Starting at about 02:24 in this video... I was going to say _"You had to go there,"_ but even wording it THAT WAY might be too innuendo-ish...😉🤭

[@SpaceMog]

😆

[@Allan_aka_RocKITEman]

​​​@@SpaceMog>>> I bet the _Rings_ around _Uranus_ are quite beautiful. {BA DUM TSSS...😊}

[@jimcabezola3051]

Given the decidely non-spherical shapes of many asteroids, it has to even more of a challenge to mathematically characterise the orbits of these tiny balls of cheese. By comparison, working out the gravitational anomalies of the Moon into one's lunar orbital calculations much be a doddle. Aloha!

[@SpaceMog]

Absolutely! More reason to send more space ships :-) Fancy going up to space to help catalogue asteroids?

[@jimcabezola3051]

@@SpaceMog Sounds like a job I wouldn't mind doing!

[@LONELY-VISUAL]

What a woman 😍

[@648Roland]

Hi Maggie. How many moons does Earth have? Read or heard there are more than just our Moon.

[@SpaceMog]

Just the one as far as I'm concerned, but with the 30,000 odd near earth asteroids it would not surprise me if you count them :-)

[@husk79]

does an asteroid have to be a certain size to have a moon and be able to create a gravitational pull for it?

[@SpaceMog]

anything with mass will have a gravitational pull so i don't think there is a minimum size, but it will be harder as force of gravity F is proportional to M/r^2 so to get the same force for a tiny mass, you need an even tinier distance

[@John-wd5cb]

Alien 1 👽: they think we are a moon.. Alien 2 👽: 🤔

[@SpaceMog]

😂 dont burst their bubble

[@John-wd5cb]

@@SpaceMog Ha ha ha! 😂

[@ARWest-bp4yb]

Can the moons have moons?🤔😄

[@SpaceMog]

Unlikely, the primary asteroid will be mass dominate usually :/

[@JohnnyWednesday]

If both members of the binary have identical masses, does that mean the moon is whichever one you're not standing on?

[@SpaceMog]

It would be pretty difficult to get such a configuration but good point 🙈

[@ianjeffery4773]

I read somwhere that remix alts get 415 gear

[@SpaceMog]

it does?

[@Eoin72]

How could you not have known that? Duh!

[@SpaceMog]

😖

[@Eoin72]

I knew that and I'm not an astrophysicist, your thumbnail made you out to be oblivious. So you're kinda dumbing down. We are not stupid.

[@SpaceMog]

@@Eoin72 youre so smart :-)

[@Eoin72]

Woman fails to take accountability.

[@Eoin72]

DART, Dimorphos.👋

[@nadal1275]

So if our huge moon is made of cheese are those tiny moons Mozzarella balls?

[@SpaceMog]

🤤

[@hankseda]

In another life, I'm filthy rich and can buy my own astroid. I'll pick one with a 🌙 build a little habitat, take 🎶 and🍷 chill watching the little moon dart across my starry sky

[@SpaceMog]

Sounds perfect! Make sure you bring earphones though

[@Andrew-tf8jt]

But this isn't new they took a sample of one a couple of years ago so to make this happen they've known for at least ten years minimum.

[@SpaceMog]

If you watched you would've known i mention that :-P

[@MadawaskaObservatory]

more like 2 billion stars

[@SpaceMog]

Correct! 😅

[@JoeDeglman]

Asteroids with satellites. Direct contradiction of Einstein's version of the General Theory.

[@SpaceMog]

:-O

[@grantravenianson]

Do we get any binary moons identifying as non-binary? Asking for a friend... hehehe! in all seriousness, great video as always and thanks for your great work and communication.

[@SpaceMog]

they can identify as whatever they like - but the IAU will still rename them :-P

[@grantravenianson]

@@SpaceMog haha!

[@theemissary1313]

You look like you're going to a fancy ball. haha. I wonder how definitions of these binary asteroids, moonlets and such will affect NASA's definition of planets, dwarf planets etc.

[@SpaceMog]

Every day is a ball 😃

[@theemissary1313]

@@SpaceMog In that case, will you be everyone's favourite fairy god-professor! 🤪