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Solar flare
A solar flare is a violent
explosion in the Sun's
atmosphere with an energy
equivalent to tens of
millions of hydrogen bombs.
Solar flares take place in
the solar corona and
chromosphere, heating plasma
... > 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
Subatomic particle
A subatomic particle is a
particle smaller than an
atom: it may be elementary
or composite. Particle
physics and nuclear physics
concern themselves with the
study of these particles,
their interactions, and
... > full story
Compton Gamma Ray Observatory
The Compton Gamma Ray
Observatory (CGRO) was the
second of the NASA "Great
Observatories" to be
launched to space, following
the Hubble Space Telescope.
The observatory was launched
... > full story
Browse Reference Articles
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Particle accelerator
A particle accelerator is a device that uses electric fields to propel electrically charged particles to high speeds and magnetic fields to contain them. An ordinary CRT televison set is a simple ... > 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 -
Electromagnetic spectrum
The electromagnetic spectrum is the range of all possible electromagnetic radiation. Above infrared in frequency comes visible light. This is the range in which the sun and stars similar to it emit ... > more -
Space observatory
A space observatory is any instrument in outer space which is used for observation of distant planets, galaxies, and other outer space objects. A large number of observatories have been launched into ... > more -
Gamma ray burst
Gamma-ray bursts are the most luminous physical phenomena in the universe known to the field of astronomy. They consist of flashes of gamma rays that last from seconds to hours, the longer ones being ... > more -
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 the universe, ... > more
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