Wednesday, February 1, 2023

Our system is still active

Not much to report on this first day of ... a month. I do see some news on the gas-giants' moons: Mimas and Valetudo.

Mimas, they say, is a water-world covered in ice like Enceladus. But it wasn't always so! It became internally slushy recently.

As for Valetudo my first reaction was, WTF is this, I've never heard of this kilometer-wide captured asteroid. Where was Valetudo when the Galileo probe was wandering all over the Jovian system? and why didn't Hubble see it?

I think Valetudo's capture is very recent. I'd love to see how its dynamics pan out but my suspicion is: fantastically eccentric over the 1900s, only brought into a visible orbit in the last decade. Or less.

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