Heute habe ich ein Video von einem der für mich beeindruckendsten Physik-Miniversuche gemacht. Dazu habe ich einen Wanderstiefel an seinen beiden Schnürsenkeln aufgehängt. Eine doppelte Drehung des Stiefels lässt sich rückgängig machen, ohne die Orientierung des Stiefels zu verändern! 1/

I would argue those look like rather shallow craters :-)

Small asteroids are weird, and fascinating.

[Image credit: ISAS/JAXA, JAXA Hayabusa 2 ONC-T v-filter, Government of Japan Standard Terms of Use (Ver.2.0)]

I've got my Pallas movie ready for tomorrow's lecture. Seestar S50 on 22 November, 2h 20m of (2) Pallas serenely moving through the outskirts of Aquarius. 🧪🔭⚛️

No, the ISS looks completely different, and also moves a *lot* faster. This is a blob with a halo - a comet. But a special one: 3I/ATLAS which came to us from another star. :-)

I did capture the ISS in front of the Moon last March, though, with the same instrument, cf. below

Yesterday, there was a completely clear night here in Heidelberg, and between 5am and 6am, my trusty little #SeestarS50, patiently waiting on the balcony, managed to catch 3I/Atlas - so here's a little animation of an extrasolar object in motion :-) 🧪🔭🎢