Plan-B-Rip-and-Tear
Plan-B-Rip-and-Tear t1_je7p075 wrote
Reply to comment by amitym in Ultramassive black hole over 30 billion times mass of our sun has been spotted. The discovery had been made possible thanks to a phenomenon known as gravitational lensing — the first time a black hole has been spotted in such a way. by Wagamaga
Astronauts in low earth orbit still feel like they are falling the whole time. Orbit means your velocity perpendicular to the action of gravity matches the rate you would be falling otherwise, resulting in you following a circular path/orbit around the object.
Same principle the vomit comet plane uses, except parallel to earths gravity instead of perpendicular. The plane loses altitude at the same rate you would fall due to gravity, so inside the cabin it’s as if you are weightless. But you feel the acceleration the whole time.
Plan-B-Rip-and-Tear t1_itvogdg wrote
Reply to comment by [deleted] in Vitamin D deficiency linked to premature death. Over a 14-year follow up period, researchers found that the risk for death significantly decreased with increased vitamin D concentrations, with the strongest effects seen among those with severe deficiencies. by Wagamaga
Also worth mentioning that several research studies in the last 10 years have concluded the original recommendations miscalculated the RDA for vitamin D and were off by a factor of 10.
https://www.sciencedaily.com/releases/2015/03/150317122458.htm
Plan-B-Rip-and-Tear t1_je8cb19 wrote
Reply to comment by amitym in Ultramassive black hole over 30 billion times mass of our sun has been spotted. The discovery had been made possible thanks to a phenomenon known as gravitational lensing — the first time a black hole has been spotted in such a way. by Wagamaga
I really should have responded to the poster you were responding to rather than you as that’s the question I intended to address about feeling 0 g’s, not gravitational gradients on intermediate and stellar sized black holes.