SEA and Astrum
Can confirm. The one thing that bugs me about Astrum is the clickbaity titles (along the lines of “The Image That Shocked NASA Scientists!”, that sort of thing), but don’t let that turn you off and away, the content is solid and the tone is much more grounded than those stupid faux-populist titles, which I’m sure the author chooses to gain traction with YouTube’s skewed algorithmic tyranny.
Another channel I’d love to add here is ParallaxNick, who does astronomy and science history videos, this man is a poet and a scholar, deserves a million subscribers and more.
He’s got that ol’ New York City Metropolitan Area Transit Authority Blues again, momma!