It is indeed likely the direction of Orion as someone suggested, although without giving a reason.

Another study I just found while searching Opher et al on Bluesky, saw us moving through a #RadcliffeWave" from 14Ma to 12.5Ma with similar impact on heliosphere and stuff. And that was in the Orion region.

https://www.univie.ac.at/en/news/press-room/press-releases/detail/the-galactic-journey-of-our-solar-system/

https://www.aanda.org/articles/aa/full_html/2025/02/aa52061-24/aa52061-24.html

So I guess, widefield astroimages of #Orion would show our most recent heliosphere and climate terrorist, Opher's hydrogen cloud.

Maybe 🤔 it looks like the interstellar medium around the Pleiades, that verra pretty whitish haze. In and around the constellation. You can see it in stacked widefield images taken without telescopes.

Very pleased to have found the other study about the #Miocene cloud.

What'S the fuss?
Climate sensitivity. IMO, we can't use climate knowledge from before 750ka to inform today's #climateSensitivity calculation.
Hell, the hydrogen cloud denting the protective heliosphere will have increased Earth's cloud cover because of the increased cosmic rays which are cloud-seeders. And clouds... are the biggest uncertainty in today's ECS.

Also Earth herself changed a LOT since 14Ma. Ocean thruways, mountain ranges, biomes, nothing today is comparable to earlier than 1Ma, 750ka with the cloud. See the video of Chris Scotese's tectonics and the chart for CO2 and °C by Judd, Tierny 2024.

#Astronomy #astrophotography #climateChange