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miasabine t1_ivpc3dp wrote

Reply to comment by herbw in TIL that most non-human primate infants actively use their hands to help themselves out of the birth canal. Human infants do not, but their grip strength is much higher during the hours immediately after they are born. by afeeney

about 6 million years, the modern form of humans only evolved about 200,000 years ago.” https://www.universetoday.com/38125/how-long-have-humans-been-on-earth/ “Modern humans originated in Africa within the past 200,000 years” https://www.yourgenome.org/stories/evolution-of-modern-humans/

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TomThePancake t1_iyepzae wrote

Reply to comment by iamatooltoo in what exactly happens when 2 galaxies collide? by [deleted]

They can, according to this article. [https://www.universetoday.com/116872/planets-could-travel-along-with-rogue-hypervelocity-stars-spreading-life-throughout-the-universe/](https://www.universetoday.com/116872/planets-could-travel-along-with-rogue-hypervelocity-stars-spreading-life-throughout-the-universe/)

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I_Heart_Astronomy t1_jaisc5e wrote

Reply to comment by Spider_pig448 in Satellite Constellations Are an Existential Threat for Astronomy by ChieftainMcLeland

natural background brightness by 10% in dark areas that are normally free of artificial light pollution: https://www.universetoday.com/150759/satellites-have-brightened-the-skies-by-about-10-across-the-entire-planet/ Just wait until all this over-commercialization of space results in 100x the number of satellites

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Nerull t1_jdy8gyp wrote

Reply to Hypothetical question by jd-sutton

glare at all. Here's a planet 25ly away from the Hubble Space Telescope: https://www.universetoday.com/wp-content/uploads/2008/11/fomalhaut-planet.jpg

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Brickleberried t1_is1wsck wrote

Reply to comment by ContentDoor1704 in Ask Anything Wednesday - Physics, Astronomy, Earth and Planetary Science by AutoModerator

galaxies rotate? It's simply conservation of angular momentum. To steal from [this article](https://www.universetoday.com/146342/study-of-200000-galaxies-reveals-the-entire-universe-might-have-been-spinning-in-one-direction-early-on/): > Structures rotate because of a property known as angular momentum. Angular momentum is a measure of mass

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