Recent comments in /f/askscience

DreamOfTheEndlessSky t1_j27w0f6 wrote

Reply to comment by canadave_nyc in How fast does the Milky Way spin? How far does Earth move through space in a year? by Sabre-Tooth-Monkey

Suppose we were at exactly zero motion relative to the CMB. If we underwent any gravitational interaction with another body, each would undergo some acceleration. That would leave each body with a non-zero motion relative to the CMB. So any local gravitational interaction would take us away from zero-CMB-motion.

Barring some sort of speculative restorative effect that brings us back to zero-CMB-motion, you'll be left with non-zero motion relative to the CMB.

So local interactions later on would be enough to create some motion.

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the6thReplicant t1_j27vd9m wrote

Reply to What did we learn from that probe that touched the sun a year ago? by Vasarto

The Parker Solar Probe (NASA)? Or the Solar Probe (ESA)?

Either case they are still in the middle/beginning of their mission.

You should probably just Google the above, since it's such an open ended question and nothing to narrow down what you're interested in or where you are coming from.

For instance articles about PSP: https://arxiv.org/search/?query=parker+solar+probe&searchtype=all&abstracts=show&order=-announced_date_first&size=50

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CatalyticDragon t1_j27tjmr wrote

Reply to If collagen is a protein, and proteins are broken down during digestion, why would collagen or collagen supplements be beneficial? Is it just hype? by skepticated

Eating collagen, smearing it on your face, rubbing it into your hands, does absolutely nothing. When you eat it your digestive system breaks it down into amino acids as with any other protein.

Your body (fibroblasts) synthesizes collagen from amino acids, primarily glycine-proline-X or glycine-X-hydroxyproline. It makes as much as it needs or as much as it can. You don't push more into your cells through consumption or osmosis.

There is as much science behind collagen supplements or cremes as there is behind eating a bear's gall bladder for sexual potency.

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Willbilly1221 t1_j27t7qi wrote

Reply to comment by Aseyhe in How fast does the Milky Way spin? How far does Earth move through space in a year? by Sabre-Tooth-Monkey

How fast is the Andromeda galaxy moving?

Edit: i realize I’m on reddit, not being smart ass, but i was wondering how we use those speeds to calculate how long until the milky way and andromeda collide. Thats why i was curious how fast is andromeda moving? Re-reading my initial question sounded sarcastic. Sorry i do that. Im autistic.

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kleiner-Wasserbaer t1_j27sza9 wrote

Reply to If collagen is a protein, and proteins are broken down during digestion, why would collagen or collagen supplements be beneficial? Is it just hype? by skepticated

Research is limited on if dietary supplementation of collagen is effective at improving joint/skin health and much of the research is funded by the companies that produce it so more research is needed. Collagen is broken down into amino acids in the stomach so there is not much risk to the supplements but the marketing of it is pretty much hype.

https://www.hsph.harvard.edu/nutritionsource/collagen/

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