They are rarely able to make such a recording.
Galaxies often interact with each other: they can merge, collide, or simply pass each other, all of which has a significant impact on their shape and structure. Although these interactions are quite common in the universe, it is very rare to get a shot that clearly shows the in confrontation the interaction of participating galaxies with each other – the Hubble space telescope managed to capture such an image a few years ago:
This image shows the interacting galaxy pair Arp 282, which consists of the Seyfert galaxy NGC 169 (bottom) and the galaxy IC 1559 (top)
When two galaxies interact, the tidal forces* create gas, dust, and even entire solar systems they leave from one galaxy to another. And in the recording above, you can see exactly this, i.e. the way in which fine streams of matter formed that connect the two galaxies.
*Tidal forces occur when the mass attraction, i.e. gravity, of one object causes the distortion or elongation of another object. The direction of tidal forces is away from the less massive object and towards the more massive object.
(Source: Hubble, photo: ESA/Hubble & NASA, J. Dalcanton, Dark Energy Survey, DOE, FNAL/DECam, CTIO/NOIRLab/NSF/AURA, SDSS Acknowledgment: J. Schmidt)
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