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Ultimate fate of the universe
The ultimate fate of the
universe is a subject of
study in the field of
cosmology. Vying scientific
theories predict whether the
life of the universe is
finite or infinite. Current
... > full story
Big Bang nucleosynthesis
In physical cosmology, Big
Bang nucleosynthesis (or
primordial nucleosynthesis)
refers to the production of
nuclei other than H-1, the
normal, light hydrogen,
during the early phases of
... > full story
Shape of the Universe
The shape of the Universe is
a subject of investigation
within physical cosmology.
Cosmologists and astronomers
describe the geometry of the
Universe which includes both
local geometry and global
geometry. The shape of the u ... > full story
Dark matter
In astrophysics and
cosmology, dark matter is
hypothetical matter of
unknown composition that
does not emit or reflect
enough electromagnetic
radiation to be observed
directly, but whose presence
... > full story
Browse Reference Articles
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Large-scale structure of the cosmos
In physical cosmology, the term large-scale structure refers to the characterization of observable distributions of matter and light on the largest scales (typically on the order of billions of ... > more -
Brown dwarf
Brown dwarfs were originally called black dwarfs, a classification for dark substellar objects floating freely in space which were too low in mass to sustain stable hydrogen ... > more -
Dark energy
In physical cosmology, dark energy is a hypothetical form of energy that permeates all of space and tends to increase the rate of expansion of the universe. Assuming the existence of dark energy is ... > more -
Physical cosmology
Physical cosmology, as a branch of astrophysics, is the study of the large-scale structure of the universe and is concerned with fundamental questions about its formation and evolution. Cosmology ... > more -
Galaxy formation and evolution
The formation of galaxies is still one of the most active research areas in astrophysics; and, to some extent, this is also true for galaxy evolution. Some ideas, however, are now widely accepted. ... > more -
Interstellar medium
The interstellar medium (or ISM) is the name astronomers give to the tenuous gas and dust that pervade interstellar space. Whilst the ISM refers to the matter (interstellar matter, also abbreviated ... > more -
Astrophysics
Astrophysics is the branch of astronomy that deals with the physics of the universe, including the physical properties (luminosity, density, temperature and chemical composition) of astronomical ... > more -
Multiverse
A multiverse (or meta-universe) is the hypothetical set of multiple possible universes, including our universe, which comprise the absolute whole of physical ... > more
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