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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
Supergiant
Supergiants are the most
massive stars. Supergiants
can have masses from 10 to
70 solar masses and
brightness from 30,000 up to
hundreds of thousands times
the solar luminosity. They
vary greatly in radii,
... > full story
Nucleosynthesis
Nucleosynthesis is the
process of creating new
atomic nuclei from
preexisting nucleons
(protons and neutrons). The
primordial preexisting
nucleons were formed from
the quark-gluon plasma of
... > 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
Browse Reference Articles
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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 understanding of ... > 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 -
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 -
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 -
Blue supergiant
Blue supergiants are supergiant stars (class I) of spectral type O. They are extremely hot and bright, with surface temperatures of between 20,000 - 50,000 degrees Celsius. The best known example is ... > more -
Presentism (philosophy of time)
In the philosophy of time, presentism is the belief that neither the future nor the past exists. The opposite of presentism is 'eternalism', which is a belief in things that are past and things that ... > 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 -
Cosmic microwave background radiation
In cosmology, the cosmic microwave background radiation is a form of electromagnetic radiation discovered in 1965. It has a thermal black-body spectrum which peaks in the microwave range. Most ... > more
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