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{{short description|Hypothetical form of cold dark matter proposed to solve the cuspy halo problem}} ...]] on the order of 1 [[light year]]. Fuzzy cold dark matter halos in dwarf galaxies would manifest wave behavior on astrophysical scales, and the cusps would b ...

...line and continuum). Then <math>W_\lambda</math> represents the width of a hypothetical line which drops to an intensity of zero and has the "same integrated flux ...duard | title = Star formation indicators and line equivalent width in Lya galaxies | journal = [[Monthly Notices of the Royal Astronomical Society]] | volume ...

[[Category:Dwarf galaxies]] [[Category:Hypothetical galaxies]] ...

{{Short description|Hypothetical object}} '''Antimatter comets''' and '''antimatter meteoroids''' are hypothetical [[comet]]s and [[meteoroid]]s composed solely of [[antimatter]] instead of ...

...of gravity without requiring unseen dark matter. This concept explains why galaxies and clusters exhibit stronger-than-expected gravitational effects—gravity i ** As galaxies formed and clustered, mass damping increased, accelerating expansion withou ...

{{Short description|Hypothetical black hole formed soon after the Big Bang}} In [[cosmology]], '''primordial black holes''' ('''PBHs''') are hypothetical [[black hole]]s that formed soon after the [[Big Bang]]. In the [[inflation ...

...ala2010 />{{rp|2}} Entropy production can be approximated as the number of galaxies in the diamond.<ref name=LindeNoorbala2010 />{{rp|2}} ...timescale due to [[Anthropic principle|anthropic]] selection effects; this hypothetical breakdown is sometimes called the "Guth–Vanchurin paradox". One proposed re ...

...gy]]), much less than the density of ordinary matter or dark matter within galaxies. However, it dominates the universe's mass–energy content because it is uni ...r (baryons). These models were found to be successful at forming realistic galaxies and clusters, but some problems appeared in the late 1980s: in particular, ...

...|4.1}} Clouds of hydrogen collapsed very slowly to form stars and [[galaxy|galaxies]], so there were few sources of light and the emission from these sources w ...int around 200 to 500 million years, the earliest generations of stars and galaxies form (exact timings are still being researched), and early large structures ...

...ntz and CPT violations through [[spontaneous symmetry breaking]] caused by hypothetical background fields, resulting in some sort of [[preferred frame]] effects. T ...rom distant astrophysical sources such as [[gamma ray bursts]] and distant galaxies has been examined in many experiments. Especially the [[Fermi Gamma-ray Spa ...

...Status and Perspectives of Continuous Gravitational Wave Searches |journal=Galaxies |language=en |volume=10 |issue=3 |pages=72 |arxiv=2202.01088 |bibcode=2022G ...-Wave Backgrounds: Current Detection Efforts and Future Prospects |journal=Galaxies |language=en |volume=10 |issue=1 |pages=34 |arxiv=2202.00178 |bibcode=2022G ...

Observations by the [[Swift Gamma-Ray Burst Mission]] of nearby galaxies in the region of the detection, two days after the event, did not detect an ..., and can also be obscured or hidden behind other objects. Objects such as galaxies and nebulae can also absorb, re-emit, or modify light generated within or b ...

...ne (mechanical)|machinery]], [[spacecraft]], [[planets]], [[star]]s, and [[galaxies]]. The development of classical mechanics involved [[Scientific Revolution| ...chanics]].) Objects with non-zero size have more complicated behavior than hypothetical point particles, because of the additional [[degrees of freedom (physics an ...

The field required for this to happen (which was purely hypothetical at the time) became known as the ''Higgs field'' (after [[Peter Higgs]], on ...'s role in determining the mass of other particles. It suggests that other hypothetical scalar fields suggested by other theories, from the [[inflaton]] to [[quint ...

...tronomical objects]], such as [[spacecraft]], [[planets]], [[star]]s and [[galaxies]]. ...oratory engineering]]''' – the process of designing and analyzing detailed hypothetical models of systems that are not feasible with current technologies or method ...

...., Fisher (1930) stated that “The whole group of theories which ascribe to hypothetical physiological mechanisms, controlling the occurrence of mutations, a power ...dynamic systems or astronomers who study spatial arrangements of stars and galaxies' In each case, the researcher examines the products of historical processes ...

...Liu |first4=Jifeng |title=Three Brown Dwarfs Masquerading as High-Redshift Galaxies in JWST Observations |date=2025 |class=astro-ph.SR }}</ref> ...star's debris disk causing NASA and several news outlets to compare to the hypothetical [[Planet Nine]].<ref name="Planet Nine">{{Cite web|url=http://www.nasa.gov/ ...

{{term|term=[[Carnot cycle]]|content='''[[Carnot cycle]]'''}}{{defn|defn=A hypothetical thermodynamic cycle for a heat engine; no thermodynamic cycle can be more e ...ngs with [[mass]] or [[energy]]—including [[planet]]s, [[star]]s, [[galaxy|galaxies]], and even [[light]]<ref name="Comins">{{cite book ...