Lyman-alpha
Ultraviolet hydrogen line
Lyman-alpha refers to light emitted when a hydrogen atom's electron drops from its second-lowest energy state to its lowest, producing ultraviolet radiation at a specific wavelength.
Astronomers use Lyman-alpha emissions to detect distant galaxies and study the early universe: The telescope captured Lyman-alpha radiation from a galaxy 13 billion light-years away.
Named for physicist Theodore Lyman.
Simplest atomic element
- emissionDischarged substance or act
- absorptionProcess of taking in
- wavelengthSpatial repetition interval
- ultravioletWavelengths shorter than violet
spectral line · transition · ground state · photon · resonance · spectrum · fluorescence · excitation
Wavelength stretch from recession
- quasarLuminous active galactic core
- primordialExisting from the start
- HubbleRenowned astronomer's surname
- cosmologicalRelating to universe's origin/structure
first light · recombination · dark ages · epoch · expansion · Big Bang · extragalactic · deep field
Interstellar gas formation
- LABMulti-purpose technical acronym
- diffuseSpread thinly throughout
- giantBeing of huge size
- fluorescenceLight emitted after absorption
Sending of information
- gas cloudsDiffuse interstellar matter collections
- filamentsVery thin threads
- clusteringForming concentrated groups
Producing new celestial bodies
- detectionAct of finding something
- selectionChosen item or items
- photometricPertaining to brightness measurement
- clusteringForming concentrated groups
Subaru · candidate · dropout · starburst · population · census
hydrogen
Simplest atomic element
- emissionDischarged substance or act
- absorptionProcess of taking in
- wavelengthSpatial repetition interval
ultraviolet · spectral line · transition · ground state · photon · resonance · spectrum · fluorescence · excitation · atomic
redshift
Wavelength stretch from recession
- quasarLuminous active galactic core
- primordialExisting from the start
- HubbleRenowned astronomer's surname
cosmological · first light · recombination · dark ages · epoch · expansion · Big Bang · extragalactic · deep field
nebula
Interstellar gas formation
transmission
Sending of information
- gas cloudsDiffuse interstellar matter collections
- filamentsVery thin threads
- clusteringForming concentrated groups
star-forming
Producing new celestial bodies
- detectionAct of finding something
- selectionChosen item or items
- photometricPertaining to brightness measurement
clustering · Subaru · candidate · dropout · starburst · population · census
Lyman-alphavisible light
Radiation the eye detects
infrared radiation · radio waves · optical spectrum · Balmer series · visible spectrum
alpha, alphabet, alphabetic, alphabetical, alphabetically, alphabetize, alphanumeric