radio astronomy

Studying celestial broadcasts

Radio astronomy is the branch of astronomy that studies celestial objects by detecting the radio waves they emit rather than visible light.

Radio telescopes—large dish antennas or arrays of antennas—can observe through clouds and dust that block optical telescopes, revealing phenomena like pulsars, quasars, and the cosmic microwave background radiation.

techniques

interferometry

Measurement using wave combination patterns

spectroscopyStudy of light-matter interaction
signal processingMathematical manipulation of waveforms
baselineStandard for comparison

correlation · calibration · mapping · noise reduction

spectrum

frequency

Rate of recurrence

wavelengthSpatial repetition interval
electromagnetic spectrumAll radiation frequencies ordered
microwaveRadiation-based kitchen heater

bandwidth · spectral line · continuum · polarization · hertz · megahertz · gigahertz · waveband · submillimeter

phenomena

pulsars

Rotating stars emitting radiation

quasarsExtremely luminous galactic centers
masersMicrowave emission amplifiers
magnetarsHypermagnetic neutron stars

redshift · cosmic rays · gravitational lensing

instruments

dish

Food container or recipe

antennaBroadcast signal receiver
interferometerInstrument measuring wave interference
receiverOne who accepts transmission

parabolic reflector · spectrometer

radio astronomy

interferometry

frequency

pulsars

dish

radio astronomy

Opposites

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