What is dark matter with quantum qualities
Astrophysics: Six Explanations for Dark Matter
What is the universe made of? It used to be thought that it was just "normal" matter, that is, the substance of which stars, planets and we humans are made. However, the measurement of galaxy movements and the mapping of large-scale structures in the cosmos has since convinced many experts that there must be another form of matter that is invisible to the human eye and to telescopes. But what is hidden behind this ominous dark matter? Is it a previously unknown elementary particle? And if so, which one? Or is there something wrong with our understanding of gravity? We have compiled the most plausible theories.
1. Hidden ordinary matter
When astronomers discovered in the 1970s that there was a lack of matter in space, they initially assumed that not all ordinary matter had yet been found. For example, there could be very cold gas or dust clouds that do not emit infrared radiation. However, they would have to have huge dimensions and would warm up noticeably in the medium term if they were in the vicinity of a galaxy.
Chilled brown dwarfs and similar massive bodies are another possibility. Researchers affectionately call them MACHOs (Massive Astrophysical Compact Halo Objects). They also consist of normal matter, i.e. atoms and known elementary particles. However, in many cases they are too dark to show up on telescope images.
You can still track them down in a roundabout way: Brown dwarfs can act as gravitational lenses and amplify starlight when they pass in front of a star. Astronomers have rarely seen such events. Most researchers therefore agree: MACHOs do not even come close to bringing together the mass that is needed for dark matter, even with very optimistic estimates.
This probably also applies to black holes: large numbers of them could drift through space at the edge of galaxies and, thanks to their great gravitational attraction, explain the effects that astrophysicists attribute to dark matter. The dark lumps of mass are also very effective gravitational lenses. However, there cannot be too many of them out in space, as sky surveys have shown.
Nevertheless, some experts hold on to this option. Among other things, because gravitational wave detectors have detected black holes with a weight of around 50 solar masses in recent years that were not previously on the screen.
- What's in law
- What is the importance of magnets
- FaceApp keeps your photos private
- Where does the Army of Singapore train
- What is your definition of grit
- There is an increasing number of YouTube views
- Why do we believe that there are extraterrestrials
- What's the number for Taylor Swift
- How has Quora changed over the years
- Why did you have your gallbladder removed
- How many presidential libraries are there
- What is antialiasing in computer graphics
- Why can't a sentence begin with it because
- Cancer can live in an alkaline body
- Is CFA helpful in investment banking
- Political correctness is more offensive
- What happened to the Lehman Brothers employees
- Where is polygamy legal
- Why aren't pneumatic tires more popular?
- What do you call an abortion doctor
- How many foreigners live in China
- Is it good to eat fat?
- Chrome is the best browser for development
- What is a silver dollar certificate worth
- Can I earn 10 Bitcoin for free every day
- How many generations do you live
- How are yachts painted
- Supports DDR4 RAM Windows 7 Professional
- How can AI be useful in psycholinguistics
- How do I get a trade license
- Who will buy raw oil
- Is learning really important
- Why is my Pebble Smartwatch not charging?