Space

cross-posted from: https://lemmy.world/post/989297

Scientists have observed for the first time the faint ripples caused by the motion of black holes that are gently stretching and squeezing everything in the universe.

cross-posted from: https://beehaw.org/post/697648

Exposure to microgravity causes changes to the human immune system:

"Here we show that the expression of many genes related to immune functions rapidly decreases when astronauts reach space, while the opposite happens when they return to Earth after six months aboard the ISS," said Dr. Odette Laneuville, an associate professor at the Department of Biology of the University of Ottawa, leading author of a new study in Frontiers in Immunology.

doi: https://dx.doi.org/10.3389/fimmu.2023.1171103

cross-posted from: https://beehaw.org/post/659341

This article summarizes findings showing that the Spitzer telescope has observed the spectral signature of tryptophan in an extrasolar system.

This isn't the first instance of amino acids found extra-terrestrially (previously found on asteroids), but is the first found outside our solar system. Tryptophan has a very strong and very clear spectral signature (it is ubiquitously used in life sciences for example).

doi: https://dx.doi.org/10.1093/mnras/stad1535

Orbital index is an excellent weekly roundup of space news. Highly recommended!