n. The branch of astronomy which utilizes radio waves through the use of radio telescopes to study celestial bodies and occurrences.
n. the branch of astronomy that detects and studies the radio waves emitted by celestial bodies
Radio astronomy is a subfield of astronomy that studies celestial objects at radio frequencies. The initial detection of radio waves from an astronomical object was made in the 1930s, when Karl Jansky observed radiation coming from the Milky Way. Subsequent observations have identified a number of different sources of radio emission. These include stars and galaxies, as well as entirely new classes of objects, such as radio galaxies, quasars, pulsars, and masers. The discovery of the cosmic microwave background radiation, regarded as evidence for the Big Bang theory, was made through radio astronomy.
Radio astronomy is conducted using large radio antennas referred to as radio telescopes, that are either used singularly, or with multiple linked telescopes utilizing the techniques of radio interferometry and aperture synthesis. The use of interferometry allows radio astronomy to achieve high angular resolution, as the resolving power of an interferometer is set by the distance between its components, rather than the size of its components.
Usage examples of "radio astronomy".
The Earth has harbored a technical civilization characterized by radio astronomy for only a few decades out of a lifetime of a few billion years.
You may dimly remember that months ago one of the radio astronomy groups spotted emissions similar to the Eater's from a nearby star.
They'd do some of the usual kind of radio astronomy also, of course.
She wanted a permanent record, to show the National Science Foundation what really serious radio astronomy was like.
It may have been a statistically inevitable electronic surge, or a malfunction in the detection system, or a spacecraft (from Earth), or a military aircraft flying by and broadcasting on channels that are supposed to be reserved for radio astronomy.
The first SETI program was carried out by Frank Drake at the National Radio Astronomy Observatory in Greenbank, West Virginia, in 1960.
A society only a little more backward than we will not have radio astronomy at all.
The incident he refers to took place in the early days of radio astronomy, when our observations were still planet-bound.
It only took a week before Dan had designed and set up his first message-from-the-future experiment, at a place called the National Radio Astronomy Observatory in West Virginia.
The scientists were occupied with calculations, and neither boy could make a contribution to high mathematics of the kind used in radio astronomy.