halo articles
What characteristic primarily defines dark matter in relation to light and forces?
Why did baryonic matter accumulate slower than dark matter during the early universe's cooling phase?
What is the fundamental role of dark matter halos in relation to visible galaxies?
What condition must be met for a halo to be classified as a *completely* dark dark matter halo?
What mathematical profile is frequently used by cosmologists to model the density distribution within dark matter halos?
Which physical process is cited as a reason why gas might be ejected from a smaller halo, preventing star formation?
What potential detection method relies on a dark halo temporarily bending and brightening the light of a background star?
What minimum mass, according to some research models, might a halo possess and still potentially host star formation?
What does the high prevalence of dark dark matter halos suggest about galaxy formation efficiency?
What analogy has been suggested for the density distribution within some modeled dark matter halos?
Compared to the number of visible galaxies, how common might smaller, unseen dark halos be, according to analytical comparisons of simulations?
What is the scientific name for the luminous ring encircling the moon?
What atmospheric components generate the 22° halo?
In what types of high-altitude clouds are the necessary ice crystals usually found?
By approximately what angle do hexagonal ice crystals refract moonlight to form the standard halo?
In a well-formed 22° halo, which color appears on the edge closest to the moon?
The presence of cirrus clouds preceding a 22° halo is often the first indicator of what meteorological system?
According to the text, what is the relationship between the halo and an approaching storm?
How many pinky-finger widths (held at arm's length) span the diameter of a standard 22° halo from bottom to top?
What caution is necessary when attempting to observe a solar halo?
What is the angle associated with the rarer halo mentioned, which appears much further out from the sun or moon?
What is the general geometric shape of the ice crystals responsible for forming the common halo?
Why can't telescopes detect dark matter directly?
What is the foundational proof that necessitates the existence of dark matter?
What crucial insight about the nature of dark matter was provided by observing the Bullet Cluster collision?
What is the primary role dark matter halos fulfilled in the formation of structures in the universe?
What is the defining characteristic of dark matter mentioned in the text?
If dark matter did not exist, what would likely happen to high-velocity stars in a galaxy?
How much greater can the mass contribution of dark matter be compared to the visible matter in many spiral galaxies?
What observable phenomenon indicates the presence of mass distributed far beyond where visible stars are located?
What term describes a measurable boundary marker related to the extent of a halo's dominant gravitational influence?