What role did the #Dialogo actually play in the ongoing cosmological/astronomical debate in the seventeenth century? The real answer is, given its reputation, surprisingly little. In reality Galileo was totally out of step with the actual debate that was taking place around 1630. Driven by…http://voxday.blogspot.com/2020/01/galileo-had-it-coming.html
The new research may have dramatic implications for theories about both dark matter and galaxy formation.[emphasis mine]
Astronomers have discovered 19 more galaxies missing their dark matter. Instead of dark matter, these strange galaxies are mainly filled with regular matter, like the protons, neutrons, and electrons that make up everything we're familiar with.
The new find, published November 26 in Nature Astronomy, bolsters the controversial recent discovery of two other galaxies without dark matter. The mysterious substance accounts for most matter in the universe, and it's thought to be the primary component of all galaxies — as well as the main driver of galaxy formation in the first place. So, finding so many galaxies without the exotic matter suggests astronomers are missing something major about how galaxies form and evolve.
"This result is very hard to explain using the standard galaxy formation model," said lead author Qi Guo of the Chinese Academy of Science in a press release, "and thus encourages people to revisit the nature of dark matter."
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"We thought that every galaxy had dark matter and that dark matter is how a galaxy begins," van Dokkum said in a press release after the discovery. "This invisible, mysterious substance is the most dominant aspect of any galaxy. So finding a galaxy without it is unexpected. It challenges the standard ideas of how we think galaxies work, and it shows that dark matter is real: it has its own separate existence apart from other components of galaxies."
NASA has big plans for returning astronauts to the Moon in 2024, a stepping stone on the path to sending humans to Mars. But where should the first people on the Red Planet land?https://www.nasa.gov/feature/jpl/nasas-treasure-map-for-water-ice-on-mars
A new paper published in Geophysical Research Letters will help by providing a map of water ice believed to be as little as an inch (2.5 centimeters) below the surface.
Every time you walk out the door, light from the Big Bang strikes your face, enters your eyes. This is the cosmic microwave background radiation - the left-over heat-glow from the very early universe. We can’t see this microwave light with our eyes, but we can catch it with even a simple radio antenna. As soon as we became aware of its existence we’ve been feverishly building better and better devices to collect it. Why? Because it encodes so many secrets. And within this light, a group of scientists have just found evidence of the limits of space. A clue that our universe may be actually be finite in size. Today on Space Time Journal Club we’ll delve into the Nature Astronomy paper that just reported this: Planck evidence for a closed Universe and a possible crisis for cosmology by Eleonora Di Valentino, Alessandro Melchiorri, and Joe Silk.#WilkinsonMicrowaveAnisotropyProbe #WMAP #data #analysis #space #science #astronomy #cosmicMicrowaveBackground #CMB #radiation #PBSSPaceTime #invidious
Paleontology is AMAZING.
Look at this 18,000 year old dog.
Look at it. Seriously.
This is nuts. It looks like it is sleeping and could wake up any moment to beg for treats.
Scientists are trying to determine if it is a wolf or an early domesticated dog.
Link - https://www.cnn.com/travel/article/frozen-puppy-intl-scli-scn/index.html
#Paleontology #Wolf #Dog #fossil #fossils
Hello. I like #physics, #astronomy and #philosophy.
I think that everybody can joke about everything.
Also I like watching #anime and reading #books. I love #imageboards.
And I am looking for a pen pal. I mean, to chat using real letters. ✉️